3131166356531 has 2 divisors, whose sum is σ = 3131166356532. Its totient is φ = 3131166356530.

The previous prime is 3131166356501. The next prime is 3131166356533. The reversal of 3131166356531 is 1356536611313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3131166356531 - 2³⁸ = 2856288449587 is a prime.

It is a super-2 number, since 2×3131166356531² (a number of 26 digits) contains 22 as substring.

Together with 3131166356533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3131166356533) 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, 1565583178265 + 1565583178266.

It is an arithmetic number, because the mean of its divisors is an integer number (1565583178266).

Almost surely, 2^{3131166356531} is an apocalyptic number.

3131166356531 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131166356531 is an equidigital number, since it uses as much as digits as its factorization.

3131166356531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 44.

The spelling of 3131166356531 in words is "three trillion, one hundred thirty-one billion, one hundred sixty-six million, three hundred fifty-six thousand, five hundred thirty-one".