221431464152631 has 12 divisors (see below), whose sum is σ = 320887290075352. Its totient is φ = 147140126014896.

The previous prime is 221431464152599. The next prime is 221431464152659. The reversal of 221431464152631 is 136251464134122.

221431464152631 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 3 + 1 + 4 + 6 + 4 + 1 + 5 + 2 + 631 = 666.

It is not a de Polignac number, because 221431464152631 - 2⁵ = 221431464152599 is a prime.

It is a super-2 number, since 2×221431464152631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431464153631) 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 in 11 ways as a sum of consecutive naturals, for example, 40070837656 + ... + 40070843181.

Almost surely, 2^{221431464152631} is an apocalyptic number.

221431464152631 is a deficient number, since it is larger than the sum of its proper divisors (99455825922721).

221431464152631 is a wasteful number, since it uses less digits than its factorization.

221431464152631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80141681150 (or 80141681147 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 221431464152631 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixty-four million, one hundred fifty-two thousand, six hundred thirty-one".