165312523 has 8 divisors (see below), whose sum is σ = 173265408. Its totient is φ = 157423464.

The previous prime is 165312493. The next prime is 165312527. The reversal of 165312523 is 325213561.

165312523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165312523 - 2⁹ = 165312011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165312491 and 165312500.

It is not an unprimeable number, because it can be changed into a prime (165312527) 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, 10611 + ... + 21052.

It is an arithmetic number, because the mean of its divisors is an integer number (21658176).

Almost surely, 2^165312523 is an apocalyptic number.

165312523 is a deficient number, since it is larger than the sum of its proper divisors (7952885).

165312523 is a wasteful number, since it uses less digits than its factorization.

165312523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31913.

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

The square root of 165312523 is about 12857.3917650510. The cubic root of 165312523 is about 548.8267253653.

The spelling of 165312523 in words is "one hundred sixty-five million, three hundred twelve thousand, five hundred twenty-three".