31043331321402 has 64 divisors (see below), whose sum is σ = 64401528672000. Its totient is φ = 9963911720448.

The previous prime is 31043331321367. The next prime is 31043331321407. The reversal of 31043331321402 is 20412313334013.

It is a self number, because there is not a number n which added to its sum of digits gives 31043331321402.

It is not an unprimeable number, because it can be changed into a prime (31043331321407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280552224 + ... + 280662852.

It is an arithmetic number, because the mean of its divisors is an integer number (1006273885500).

Almost surely, 2^{31043331321402} is an apocalyptic number.

31043331321402 is an abundant number, since it is smaller than the sum of its proper divisors (33358197350598).

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

31043331321402 is a wasteful number, since it uses less digits than its factorization.

31043331321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115015.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 31043331321402 its reverse (20412313334013), we get a palindrome (51455644655415).

The spelling of 31043331321402 in words is "thirty-one trillion, forty-three billion, three hundred thirty-one million, three hundred twenty-one thousand, four hundred two".