31868774637731 has 2 divisors, whose sum is σ = 31868774637732. Its totient is φ = 31868774637730.

The previous prime is 31868774637677. The next prime is 31868774637781. The reversal of 31868774637731 is 13773647786813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31868774637731 - 2¹⁴ = 31868774621347 is a prime.

It is a super-2 number, since 2×31868774637731² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31868774637781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15934387318865 + 15934387318866.

It is an arithmetic number, because the mean of its divisors is an integer number (15934387318866).

Almost surely, 2^{31868774637731} is an apocalyptic number.

31868774637731 is a deficient number, since it is larger than the sum of its proper divisors (1).

31868774637731 is an equidigital number, since it uses as much as digits as its factorization.

31868774637731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 597445632, while the sum is 71.

The spelling of 31868774637731 in words is "thirty-one trillion, eight hundred sixty-eight billion, seven hundred seventy-four million, six hundred thirty-seven thousand, seven hundred thirty-one".