165052531 has 24 divisors (see below), whose sum is σ = 201998880. Its totient is φ = 134209152.

The previous prime is 165052501. The next prime is 165052549. The reversal of 165052531 is 135250561.

It is not a de Polignac number, because 165052531 - 2⁷ = 165052403 is a prime.

It is a super-2 number, since 2×165052531² = 54484675979011922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165052531.

It is not an unprimeable number, because it can be changed into a prime (165052501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153865 + ... + 154933.

It is an arithmetic number, because the mean of its divisors is an integer number (8416620).

Almost surely, 2^165052531 is an apocalyptic number.

165052531 is a deficient number, since it is larger than the sum of its proper divisors (36946349).

165052531 is a wasteful number, since it uses less digits than its factorization.

165052531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 165052531 is about 12847.2771823449. The cubic root of 165052531 is about 548.5388556073.

The spelling of 165052531 in words is "one hundred sixty-five million, fifty-two thousand, five hundred thirty-one".