31322312887 has 2 divisors, whose sum is σ = 31322312888. Its totient is φ = 31322312886.

The previous prime is 31322312803. The next prime is 31322312899. The reversal of 31322312887 is 78821322313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31322312887 is a prime.

It is a super-2 number, since 2×31322312887² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31322315887) 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, 15661156443 + 15661156444.

It is an arithmetic number, because the mean of its divisors is an integer number (15661156444).

Almost surely, 2^31322312887 is an apocalyptic number.

31322312887 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322312887 is an equidigital number, since it uses as much as digits as its factorization.

31322312887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The spelling of 31322312887 in words is "thirty-one billion, three hundred twenty-two million, three hundred twelve thousand, eight hundred eighty-seven".