165523230 has 32 divisors (see below), whose sum is σ = 441396000. Its totient is φ = 44139456.

The previous prime is 165523199. The next prime is 165523243. The reversal of 165523230 is 32325561.

165523230 is a `hidden beast` number, since 1 + 655 + 2 + 3 + 2 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 165523194 and 165523203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306255 + ... + 306794.

It is an arithmetic number, because the mean of its divisors is an integer number (13793625).

Almost surely, 2^165523230 is an apocalyptic number.

165523230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165523230 is an abundant number, since it is smaller than the sum of its proper divisors (275872770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165523230 is a wasteful number, since it uses less digits than its factorization.

165523230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613065 (or 613059 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 165523230 is about 12865.5831581783. The cubic root of 165523230 is about 549.0598041692.

Adding to 165523230 its reverse (32325561), we get a palindrome (197848791).

The spelling of 165523230 in words is "one hundred sixty-five million, five hundred twenty-three thousand, two hundred thirty".