165252631 has 16 divisors (see below), whose sum is σ = 183389184. Its totient is φ = 148111744.

The previous prime is 165252629. The next prime is 165252641. The reversal of 165252631 is 136252561.

It is a cyclic number.

It is not a de Polignac number, because 165252631 - 2¹ = 165252629 is a prime.

It is a super-2 number, since 2×165252631² = 54616864104844322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165252593 and 165252602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165252601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102030 + ... + 103636.

It is an arithmetic number, because the mean of its divisors is an integer number (11461824).

Almost surely, 2^165252631 is an apocalyptic number.

165252631 is a deficient number, since it is larger than the sum of its proper divisors (18136553).

165252631 is a wasteful number, since it uses less digits than its factorization.

165252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its digits is 10800, while the sum is 31.

The square root of 165252631 is about 12855.0624658148. The cubic root of 165252631 is about 548.7604381899.

The spelling of 165252631 in words is "one hundred sixty-five million, two hundred fifty-two thousand, six hundred thirty-one".