31232144131 has 2 divisors, whose sum is σ = 31232144132. Its totient is φ = 31232144130.

The previous prime is 31232144129. The next prime is 31232144149. The reversal of 31232144131 is 13144123213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31232144131 - 2¹ = 31232144129 is a prime.

It is a super-2 number, since 2×31232144131² (a number of 22 digits) contains 22 as substring.

Together with 31232144129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31232144096 and 31232144105.

It is not a weakly prime, because it can be changed into another prime (31232144101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616072065 + 15616072066.

It is an arithmetic number, because the mean of its divisors is an integer number (15616072066).

Almost surely, 2^31232144131 is an apocalyptic number.

31232144131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232144131 is an equidigital number, since it uses as much as digits as its factorization.

31232144131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

Adding to 31232144131 its reverse (13144123213), we get a palindrome (44376267344).

The spelling of 31232144131 in words is "thirty-one billion, two hundred thirty-two million, one hundred forty-four thousand, one hundred thirty-one".