165561052 has 12 divisors (see below), whose sum is σ = 291677400. Its totient is φ = 82224656.

The previous prime is 165561043. The next prime is 165561089. The reversal of 165561052 is 250165561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138298 + ... + 139489.

It is an arithmetic number, because the mean of its divisors is an integer number (24306450).

Almost surely, 2^165561052 is an apocalyptic number.

It is an amenable number.

165561052 is a deficient number, since it is larger than the sum of its proper divisors (126116348).

165561052 is a wasteful number, since it uses less digits than its factorization.

165561052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277940 (or 277938 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 165561052 is about 12867.0529648401. The cubic root of 165561052 is about 549.1016209752.

The spelling of 165561052 in words is "one hundred sixty-five million, five hundred sixty-one thousand, fifty-two".