31232332231 has 2 divisors, whose sum is σ = 31232332232. Its totient is φ = 31232332230.

The previous prime is 31232332139. The next prime is 31232332249. The reversal of 31232332231 is 13223323213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31232332231 - 2²¹ = 31230235079 is a prime.

It is a super-2 number, since 2×31232332231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31232332196 and 31232332205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31232330231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616166115 + 15616166116.

It is an arithmetic number, because the mean of its divisors is an integer number (15616166116).

Almost surely, 2^31232332231 is an apocalyptic number.

31232332231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232332231 is an equidigital number, since it uses as much as digits as its factorization.

31232332231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 25.

Adding to 31232332231 its reverse (13223323213), we get a palindrome (44455655444).

The spelling of 31232332231 in words is "thirty-one billion, two hundred thirty-two million, three hundred thirty-two thousand, two hundred thirty-one".