31032421400 has 24 divisors (see below), whose sum is σ = 72150380220. Its totient is φ = 12412968480.

The previous prime is 31032421373. The next prime is 31032421411. The reversal of 31032421400 is 412423013.

It is a super-2 number, since 2×31032421400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 77580854 + ... + 77581253.

Almost surely, 2^31032421400 is an apocalyptic number.

It is an amenable number.

31032421400 is an abundant number, since it is smaller than the sum of its proper divisors (41117958820).

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

31032421400 is a wasteful number, since it uses less digits than its factorization.

31032421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155162123 (or 155162114 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31032421400 its reverse (412423013), we get a palindrome (31444844413).

The spelling of 31032421400 in words is "thirty-one billion, thirty-two million, four hundred twenty-one thousand, four hundred".