165795431 has 16 divisors (see below), whose sum is σ = 178960320. Its totient is φ = 153204480.

The previous prime is 165795419. The next prime is 165795451. The reversal of 165795431 is 134597561.

It is a cyclic number.

It is not a de Polignac number, because 165795431 - 2¹⁰ = 165794407 is a prime.

It is a super-2 number, since 2×165795431² = 54976249880951522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165795451) 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, 101981 + ... + 103593.

It is an arithmetic number, because the mean of its divisors is an integer number (11185020).

Almost surely, 2^165795431 is an apocalyptic number.

165795431 is a deficient number, since it is larger than the sum of its proper divisors (13164889).

165795431 is a wasteful number, since it uses less digits than its factorization.

165795431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786.

The product of its digits is 113400, while the sum is 41.

The square root of 165795431 is about 12876.1574625352. The cubic root of 165795431 is about 549.3606134616.

The spelling of 165795431 in words is "one hundred sixty-five million, seven hundred ninety-five thousand, four hundred thirty-one".