31240432002 has 32 divisors (see below), whose sum is σ = 67293914688. Its totient is φ = 9611464896.

The previous prime is 31240431991. The next prime is 31240432009. The reversal of 31240432002 is 20023404213.

It is a self number, because there is not a number n which added to its sum of digits gives 31240432002.

It is not an unprimeable number, because it can be changed into a prime (31240432009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1295568 + ... + 1319460.

It is an arithmetic number, because the mean of its divisors is an integer number (2102934834).

Almost surely, 2^31240432002 is an apocalyptic number.

31240432002 is an abundant number, since it is smaller than the sum of its proper divisors (36053482686).

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

31240432002 is a wasteful number, since it uses less digits than its factorization.

31240432002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40674.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 31240432002 its reverse (20023404213), we get a palindrome (51263836215).

The spelling of 31240432002 in words is "thirty-one billion, two hundred forty million, four hundred thirty-two thousand, two".