165992523 has 4 divisors (see below), whose sum is σ = 221323368. Its totient is φ = 110661680.

The previous prime is 165992483. The next prime is 165992557. The reversal of 165992523 is 325299561.

165992523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325299561 = 3 ⋅108433187.

It is a cyclic number.

It is not a de Polignac number, because 165992523 - 2⁶ = 165992459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165992423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27665418 + ... + 27665423.

It is an arithmetic number, because the mean of its divisors is an integer number (55330842).

Almost surely, 2^165992523 is an apocalyptic number.

165992523 is a deficient number, since it is larger than the sum of its proper divisors (55330845).

165992523 is an equidigital number, since it uses as much as digits as its factorization.

165992523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55330844.

The product of its digits is 145800, while the sum is 42.

The square root of 165992523 is about 12883.8085595836. The cubic root of 165992523 is about 549.5782143635.

The spelling of 165992523 in words is "one hundred sixty-five million, nine hundred ninety-two thousand, five hundred twenty-three".