31201230400 has 42 divisors (see below), whose sum is σ = 76774531490. Its totient is φ = 12480491520.

The previous prime is 31201230397. The next prime is 31201230427. The reversal of 31201230400 is 403210213.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1751924736 + 29449305664 = 41856^2 + 171608^2 .

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

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 9748785 + ... + 9751984.

Almost surely, 2^31201230400 is an apocalyptic number.

It is an amenable number.

31201230400 is an abundant number, since it is smaller than the sum of its proper divisors (45573301090).

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

31201230400 is a wasteful number, since it uses less digits than its factorization.

31201230400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19500791 (or 19500776 counting only the distinct ones).

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

Adding to 31201230400 its reverse (403210213), we get a palindrome (31604440613).

The spelling of 31201230400 in words is "thirty-one billion, two hundred one million, two hundred thirty thousand, four hundred".