1031223400 has 96 divisors (see below), whose sum is σ = 2649205440. Its totient is φ = 371317760.

The previous prime is 1031223397. The next prime is 1031223407. The reversal of 1031223400 is 43221301.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1031223407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71607 + ... + 84793.

It is an arithmetic number, because the mean of its divisors is an integer number (27595890).

Almost surely, 2^1031223400 is an apocalyptic number.

1031223400 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 1031223400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324602720).

1031223400 is an abundant number, since it is smaller than the sum of its proper divisors (1617982040).

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

1031223400 is a wasteful number, since it uses less digits than its factorization.

1031223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243 (or 13234 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1031223400 is about 32112.6672825538. The cubic root of 1031223400 is about 1010.3013184558.

Adding to 1031223400 its reverse (43221301), we get a palindrome (1074444701).

The spelling of 1031223400 in words is "one billion, thirty-one million, two hundred twenty-three thousand, four hundred".