31143202400 has 36 divisors (see below), whose sum is σ = 76028344812. Its totient is φ = 12457280640.

The previous prime is 31143202397. The next prime is 31143202421. The reversal of 31143202400 is 420234113.

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19463702 + ... + 19465301.

It is an arithmetic number, because the mean of its divisors is an integer number (2111898467).

Almost surely, 2^31143202400 is an apocalyptic number.

It is an amenable number.

31143202400 is an abundant number, since it is smaller than the sum of its proper divisors (44885142412).

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

31143202400 is a wasteful number, since it uses less digits than its factorization.

31143202400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38929023 (or 38929010 counting only the distinct ones).

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

Adding to 31143202400 its reverse (420234113), we get a palindrome (31563436513).

The spelling of 31143202400 in words is "thirty-one billion, one hundred forty-three million, two hundred two thousand, four hundred".