165043531 has 8 divisors (see below), whose sum is σ = 175827024. Its totient is φ = 154379520.

The previous prime is 165043523. The next prime is 165043577. The reversal of 165043531 is 135340561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165043531 - 2³ = 165043523 is a prime.

It is a super-2 number, since 2×165043531² = 54478734249895922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165043531.

It is not an unprimeable number, because it can be changed into a prime (165040531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27010 + ... + 32551.

It is an arithmetic number, because the mean of its divisors is an integer number (21978378).

Almost surely, 2^165043531 is an apocalyptic number.

165043531 is a deficient number, since it is larger than the sum of its proper divisors (10783493).

165043531 is a wasteful number, since it uses less digits than its factorization.

165043531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59741.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165043531 is about 12846.9269087981. The cubic root of 165043531 is about 548.5288851666.

The spelling of 165043531 in words is "one hundred sixty-five million, forty-three thousand, five hundred thirty-one".