31311023032002 has 32 divisors (see below), whose sum is σ = 71568657718272. Its totient is φ = 8945930946384.

The previous prime is 31311023031997. The next prime is 31311023032013. The reversal of 31311023032002 is 20023032011313.

It is a super-2 number, since 2×31311023032002² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31311023032002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1973523 + ... + 8155785.

It is an arithmetic number, because the mean of its divisors is an integer number (2236520553696).

Almost surely, 2^{31311023032002} is an apocalyptic number.

31311023032002 is an abundant number, since it is smaller than the sum of its proper divisors (40257634686270).

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

31311023032002 is a wasteful number, since it uses less digits than its factorization.

31311023032002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6302862.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31311023032002 its reverse (20023032011313), we get a palindrome (51334055043315).

The spelling of 31311023032002 in words is "thirty-one trillion, three hundred eleven billion, twenty-three million, thirty-two thousand, two".