31323443442402 has 16 divisors (see below), whose sum is σ = 62674816865760. Its totient is φ = 10436492817312.

The previous prime is 31323443442377. The next prime is 31323443442451. The reversal of 31323443442402 is 20424434432313.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 1163734627 + ... + 1163761542.

It is an arithmetic number, because the mean of its divisors is an integer number (3917176054110).

Almost surely, 2^{31323443442402} is an apocalyptic number.

31323443442402 is an abundant number, since it is smaller than the sum of its proper divisors (31351373423358).

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

31323443442402 is a wasteful number, since it uses less digits than its factorization.

31323443442402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327498417.

The product of its (nonzero) digits is 663552, while the sum is 39.

Adding to 31323443442402 its reverse (20424434432313), we get a palindrome (51747877874715).

The spelling of 31323443442402 in words is "thirty-one trillion, three hundred twenty-three billion, four hundred forty-three million, four hundred forty-two thousand, four hundred two".