165156523 has 8 divisors (see below), whose sum is σ = 188828640. Its totient is φ = 141504000.

The previous prime is 165156503. The next prime is 165156539. The reversal of 165156523 is 325651561.

165156523 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 165156523 - 2¹³ = 165148331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165156503) 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, 27273 + ... + 32773.

It is an arithmetic number, because the mean of its divisors is an integer number (23603580).

Almost surely, 2^165156523 is an apocalyptic number.

165156523 is a deficient number, since it is larger than the sum of its proper divisors (23672117).

165156523 is an equidigital number, since it uses as much as digits as its factorization.

165156523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9797.

The product of its digits is 27000, while the sum is 34.

The square root of 165156523 is about 12851.3237839532. The cubic root of 165156523 is about 548.6540344463.

The spelling of 165156523 in words is "one hundred sixty-five million, one hundred fifty-six thousand, five hundred twenty-three".