1031323120 has 80 divisors (see below), whose sum is σ = 2445870240. Its totient is φ = 404352000.

The previous prime is 1031323093. The next prime is 1031323121. The reversal of 1031323120 is 213231301.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1031323094 and 1031323103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031323121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880135 + ... + 881305.

It is an arithmetic number, because the mean of its divisors is an integer number (30573378).

Almost surely, 2^1031323120 is an apocalyptic number.

1031323120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222935120).

1031323120 is an abundant number, since it is smaller than the sum of its proper divisors (1414547120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1031323120 is a wasteful number, since it uses less digits than its factorization.

1031323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1031323120 is about 32114.2199033388. The cubic root of 1031323120 is about 1010.3338830131. Note that the first 3 decimals are identical.

Adding to 1031323120 its reverse (213231301), we get a palindrome (1244554421).

It can be divided in two parts, 10313 and 23120, that added together give a palindrome (33433).

The spelling of 1031323120 in words is "one billion, thirty-one million, three hundred twenty-three thousand, one hundred twenty".