165316251330 has 48 divisors (see below), whose sum is σ = 434651738040. Its totient is φ = 43589001984.

The previous prime is 165316251313. The next prime is 165316251337. The reversal of 165316251330 is 33152613561.

165316251330 is a `hidden beast` number, since 1 + 6 + 5 + 316 + 2 + 5 + 1 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129161890881 + 36154360449 = 359391^2 + 190143^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165316251337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10311357 + ... + 10327376.

Almost surely, 2^165316251330 is an apocalyptic number.

165316251330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165316251330 is an abundant number, since it is smaller than the sum of its proper divisors (269335486710).

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

165316251330 is a wasteful number, since it uses less digits than its factorization.

165316251330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20638835 (or 20638832 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

Adding to 165316251330 its reverse (33152613561), we get a palindrome (198468864891).

The spelling of 165316251330 in words is "one hundred sixty-five billion, three hundred sixteen million, two hundred fifty-one thousand, three hundred thirty".