31465388431 has 2 divisors, whose sum is σ = 31465388432. Its totient is φ = 31465388430.

The previous prime is 31465388429. The next prime is 31465388473. The reversal of 31465388431 is 13488356413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31465388431 - 2¹ = 31465388429 is a prime.

It is a super-2 number, since 2×31465388431² (a number of 22 digits) contains 22 as substring.

Together with 31465388429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31465388831) 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 as a sum of consecutive naturals, namely, 15732694215 + 15732694216.

It is an arithmetic number, because the mean of its divisors is an integer number (15732694216).

Almost surely, 2^31465388431 is an apocalyptic number.

31465388431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31465388431 is an equidigital number, since it uses as much as digits as its factorization.

31465388431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 46.

The spelling of 31465388431 in words is "thirty-one billion, four hundred sixty-five million, three hundred eighty-eight thousand, four hundred thirty-one".