1131322320 has 120 divisors (see below), whose sum is σ = 3999372000. Its totient is φ = 285804288.

The previous prime is 1131322267. The next prime is 1131322327. The reversal of 1131322320 is 232231311.

1131322320 is a `hidden beast` number, since 11 + 313 + 22 + 320 = 666.

1131322320 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1131322293 and 1131322302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131322327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27670 + ... + 55029.

It is an arithmetic number, because the mean of its divisors is an integer number (33328100).

Almost surely, 2^1131322320 is an apocalyptic number.

1131322320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131322320 is an abundant number, since it is smaller than the sum of its proper divisors (2868049680).

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

1131322320 is a wasteful number, since it uses less digits than its factorization.

1131322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82737 (or 82728 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1131322320 is about 33635.1352011554. The cubic root of 1131322320 is about 1041.9865628981.

Adding to 1131322320 its reverse (232231311), we get a palindrome (1363553631).

It can be divided in two parts, 11313 and 22320, that added together give a palindrome (33633).

The spelling of 1131322320 in words is "one billion, one hundred thirty-one million, three hundred twenty-two thousand, three hundred twenty".