165490525 has 24 divisors (see below), whose sum is σ = 211415040. Its totient is φ = 128439360.

The previous prime is 165490519. The next prime is 165490537. The reversal of 165490525 is 525094561.

It is not a de Polignac number, because 165490525 - 2²⁷ = 31272797 is a prime.

It is a super-2 number, since 2×165490525² = 54774227729551250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148671 + ... + 149779.

It is an arithmetic number, because the mean of its divisors is an integer number (8808960).

Almost surely, 2^165490525 is an apocalyptic number.

It is an amenable number.

165490525 is a deficient number, since it is larger than the sum of its proper divisors (45924515).

165490525 is a wasteful number, since it uses less digits than its factorization.

165490525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 165490525 is about 12864.3120686650. The cubic root of 165490525 is about 549.0236396911.

The spelling of 165490525 in words is "one hundred sixty-five million, four hundred ninety thousand, five hundred twenty-five".