1331306623631 has 2 divisors, whose sum is σ = 1331306623632. Its totient is φ = 1331306623630.

The previous prime is 1331306623601. The next prime is 1331306623643. The reversal of 1331306623631 is 1363266031331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331306623631 - 2³⁸ = 1056428716687 is a prime.

It is a super-2 number, since 2×1331306623631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331306623601) 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, 665653311815 + 665653311816.

It is an arithmetic number, because the mean of its divisors is an integer number (665653311816).

Almost surely, 2^{1331306623631} is an apocalyptic number.

1331306623631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331306623631 is an equidigital number, since it uses as much as digits as its factorization.

1331306623631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 38.

The spelling of 1331306623631 in words is "one trillion, three hundred thirty-one billion, three hundred six million, six hundred twenty-three thousand, six hundred thirty-one".