165230551 has 8 divisors (see below), whose sum is σ = 173658240. Its totient is φ = 156906552.

The previous prime is 165230543. The next prime is 165230563. The reversal of 165230551 is 155032561.

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

It is not a de Polignac number, because 165230551 - 2³ = 165230543 is a prime.

It is a super-2 number, since 2×165230551² = 54602269967527202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165230501) 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, 22645 + ... + 29038.

It is an arithmetic number, because the mean of its divisors is an integer number (21707280).

Almost surely, 2^165230551 is an apocalyptic number.

165230551 is a deficient number, since it is larger than the sum of its proper divisors (8427689).

165230551 is a wasteful number, since it uses less digits than its factorization.

165230551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51845.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 165230551 is about 12854.2036314974. The cubic root of 165230551 is about 548.7359964809.

The spelling of 165230551 in words is "one hundred sixty-five million, two hundred thirty thousand, five hundred fifty-one".