162081631 has 2 divisors, whose sum is σ = 162081632. Its totient is φ = 162081630.

The previous prime is 162081617. The next prime is 162081637. The reversal of 162081631 is 136180261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162081631 - 2⁵ = 162081599 is a prime.

It is a super-2 number, since 2×162081631² = 52540910215240322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 162081631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162081637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81040815 + 81040816.

It is an arithmetic number, because the mean of its divisors is an integer number (81040816).

Almost surely, 2^162081631 is an apocalyptic number.

162081631 is a deficient number, since it is larger than the sum of its proper divisors (1).

162081631 is an equidigital number, since it uses as much as digits as its factorization.

162081631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 162081631 is about 12731.1284260273. The cubic root of 162081631 is about 545.2277262838.

The spelling of 162081631 in words is "one hundred sixty-two million, eighty-one thousand, six hundred thirty-one".