165041631 has 20 divisors (see below), whose sum is σ = 247676352. Its totient is φ = 109522368.

The previous prime is 165041623. The next prime is 165041633. The reversal of 165041631 is 136140561.

165041631 is a `hidden beast` number, since 1 + 650 + 4 + 1 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 165041631 - 2³ = 165041623 is a prime.

It is a super-2 number, since 2×165041631² = 54477479926280322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 165041595 and 165041604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165041633) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13495 + ... + 22631.

Almost surely, 2^165041631 is an apocalyptic number.

165041631 is a deficient number, since it is larger than the sum of its proper divisors (82634721).

165041631 is an equidigital number, since it uses as much as digits as its factorization.

165041631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372 (or 9363 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 165041631 is about 12846.8529609395. The cubic root of 165041631 is about 548.5267802494.

The spelling of 165041631 in words is "one hundred sixty-five million, forty-one thousand, six hundred thirty-one".