31438892951 has 2 divisors, whose sum is σ = 31438892952. Its totient is φ = 31438892950.

The previous prime is 31438892911. The next prime is 31438892977. The reversal of 31438892951 is 15929883413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31438892951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31438892893 and 31438892902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31438892911) 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, 15719446475 + 15719446476.

It is an arithmetic number, because the mean of its divisors is an integer number (15719446476).

Almost surely, 2^31438892951 is an apocalyptic number.

31438892951 is a deficient number, since it is larger than the sum of its proper divisors (1).

31438892951 is an equidigital number, since it uses as much as digits as its factorization.

31438892951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The spelling of 31438892951 in words is "thirty-one billion, four hundred thirty-eight million, eight hundred ninety-two thousand, nine hundred fifty-one".