165320475 has 12 divisors (see below), whose sum is σ = 273329976. Its totient is φ = 88170880.

The previous prime is 165320471. The next prime is 165320483. The reversal of 165320475 is 574023561.

It is not a de Polignac number, because 165320475 - 2² = 165320471 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (165320471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1102062 + ... + 1102211.

It is an arithmetic number, because the mean of its divisors is an integer number (22777498).

Almost surely, 2^165320475 is an apocalyptic number.

165320475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165320475 is a deficient number, since it is larger than the sum of its proper divisors (108009501).

165320475 is a wasteful number, since it uses less digits than its factorization.

165320475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204286 (or 2204281 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 165320475 is about 12857.7009997900. The cubic root of 165320475 is about 548.8355252636.

The spelling of 165320475 in words is "one hundred sixty-five million, three hundred twenty thousand, four hundred seventy-five".