165523137 has 8 divisors (see below), whose sum is σ = 237674304. Its totient is φ = 101860368.

The previous prime is 165523121. The next prime is 165523159. The reversal of 165523137 is 731325561.

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

It is not a de Polignac number, because 165523137 - 2⁴ = 165523121 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 165523098 and 165523107.

It is not an unprimeable number, because it can be changed into a prime (165523637) 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, 2122053 + ... + 2122130.

It is an arithmetic number, because the mean of its divisors is an integer number (29709288).

Almost surely, 2^165523137 is an apocalyptic number.

It is an amenable number.

165523137 is a deficient number, since it is larger than the sum of its proper divisors (72151167).

165523137 is a wasteful number, since it uses less digits than its factorization.

165523137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244199.

The product of its digits is 18900, while the sum is 33.

The square root of 165523137 is about 12865.5795438837. The cubic root of 165523137 is about 549.0597013386.

Adding to 165523137 its reverse (731325561), we get a palindrome (896848698).

The spelling of 165523137 in words is "one hundred sixty-five million, five hundred twenty-three thousand, one hundred thirty-seven".