31320002231 has 12 divisors (see below), whose sum is σ = 36436741560. Its totient is φ = 26843307120.

The previous prime is 31320002227. The next prime is 31320002281. The reversal of 31320002231 is 13220002313.

It is not a de Polignac number, because 31320002231 - 2² = 31320002227 is a prime.

It is a super-2 number, since 2×31320002231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320002281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720701 + ... + 762921.

It is an arithmetic number, because the mean of its divisors is an integer number (3036395130).

Almost surely, 2^31320002231 is an apocalyptic number.

31320002231 is a deficient number, since it is larger than the sum of its proper divisors (5116739329).

31320002231 is a wasteful number, since it uses less digits than its factorization.

31320002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57374 (or 57367 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31320002231 its reverse (13220002313), we get a palindrome (44540004544).

The spelling of 31320002231 in words is "thirty-one billion, three hundred twenty million, two thousand, two hundred thirty-one".