165151631 has 2 divisors, whose sum is σ = 165151632. Its totient is φ = 165151630.

The previous prime is 165151627. The next prime is 165151697. The reversal of 165151631 is 136151561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165151631 - 2² = 165151627 is a prime.

It is a super-2 number, since 2×165151631² = 54550122443920322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165151594 and 165151603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165151621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82575815 + 82575816.

It is an arithmetic number, because the mean of its divisors is an integer number (82575816).

Almost surely, 2^165151631 is an apocalyptic number.

165151631 is a deficient number, since it is larger than the sum of its proper divisors (1).

165151631 is an equidigital number, since it uses as much as digits as its factorization.

165151631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 165151631 is about 12851.1334519567. The cubic root of 165151631 is about 548.6486172780.

The spelling of 165151631 in words is "one hundred sixty-five million, one hundred fifty-one thousand, six hundred thirty-one".