31312219771087 has 2 divisors, whose sum is σ = 31312219771088. Its totient is φ = 31312219771086.

The previous prime is 31312219771061. The next prime is 31312219771141. The reversal of 31312219771087 is 78017791221313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312219771087 is a prime.

It is a super-3 number, since 3×31312219771087³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312219771057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656109885543 + 15656109885544.

It is an arithmetic number, because the mean of its divisors is an integer number (15656109885544).

Almost surely, 2^{31312219771087} is an apocalyptic number.

31312219771087 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312219771087 is an equidigital number, since it uses as much as digits as its factorization.

31312219771087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 31312219771087 in words is "thirty-one trillion, three hundred twelve billion, two hundred nineteen million, seven hundred seventy-one thousand, eighty-seven".