31351303643 has 12 divisors (see below), whose sum is σ = 35110729584. Its totient is φ = 27963421200.

The previous prime is 31351303639. The next prime is 31351303681. The reversal of 31351303643 is 34630315313.

It is not a de Polignac number, because 31351303643 - 2² = 31351303639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31351303043) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2437943 + ... + 2450768.

It is an arithmetic number, because the mean of its divisors is an integer number (2925894132).

Almost surely, 2^31351303643 is an apocalyptic number.

31351303643 is a deficient number, since it is larger than the sum of its proper divisors (3759425941).

31351303643 is a wasteful number, since it uses less digits than its factorization.

31351303643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888786 (or 4888775 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 32.

Adding to 31351303643 its reverse (34630315313), we get a palindrome (65981618956).

The spelling of 31351303643 in words is "thirty-one billion, three hundred fifty-one million, three hundred three thousand, six hundred forty-three".