31200244040 has 32 divisors (see below), whose sum is σ = 80229199680. Its totient is φ = 10697226432.

The previous prime is 31200243989. The next prime is 31200244081. The reversal of 31200244040 is 4044200213.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55714442 + ... + 55715001.

It is an arithmetic number, because the mean of its divisors is an integer number (2507162490).

Almost surely, 2^31200244040 is an apocalyptic number.

It is an amenable number.

31200244040 is an abundant number, since it is smaller than the sum of its proper divisors (49028955640).

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

31200244040 is a wasteful number, since it uses less digits than its factorization.

31200244040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111429461 (or 111429457 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31200244040 its reverse (4044200213), we get a palindrome (35244444253).

The spelling of 31200244040 in words is "thirty-one billion, two hundred million, two hundred forty-four thousand, forty".