165520572 has 48 divisors (see below), whose sum is σ = 448637952. Its totient is φ = 46514880.

The previous prime is 165520561. The next prime is 165520577. The reversal of 165520572 is 275025561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165520577) 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, 11028 + ... + 21275.

It is an arithmetic number, because the mean of its divisors is an integer number (9346624).

Almost surely, 2^165520572 is an apocalyptic number.

165520572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165520572 is an abundant number, since it is smaller than the sum of its proper divisors (283117380).

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

165520572 is a wasteful number, since it uses less digits than its factorization.

165520572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32378 (or 32376 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 165520572 is about 12865.4798589093. The cubic root of 165520572 is about 549.0568651885.

The spelling of 165520572 in words is "one hundred sixty-five million, five hundred twenty thousand, five hundred seventy-two".