165211564 has 48 divisors (see below), whose sum is σ = 339816960. Its totient is φ = 68820480.

The previous prime is 165211561. The next prime is 165211573. The reversal of 165211564 is 465112561.

It is not an unprimeable number, because it can be changed into a prime (165211561) 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, 159729 + ... + 160759.

It is an arithmetic number, because the mean of its divisors is an integer number (7079520).

Almost surely, 2^165211564 is an apocalyptic number.

165211564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

165211564 is an abundant number, since it is smaller than the sum of its proper divisors (174605396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165211564 is a wasteful number, since it uses less digits than its factorization.

165211564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1196 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 165211564 is about 12853.4650581079. The cubic root of 165211564 is about 548.7149768623.

The spelling of 165211564 in words is "one hundred sixty-five million, two hundred eleven thousand, five hundred sixty-four".