172328516 has 6 divisors (see below), whose sum is σ = 301574910. Its totient is φ = 86164256.

The previous prime is 172328509. The next prime is 172328531. The reversal of 172328516 is 615823271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 147865600 + 24462916 = 12160^2 + 4946^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21541061 + ... + 21541068.

It is an arithmetic number, because the mean of its divisors is an integer number (50262485).

Almost surely, 2^172328516 is an apocalyptic number.

It is an amenable number.

172328516 is a deficient number, since it is larger than the sum of its proper divisors (129246394).

172328516 is a wasteful number, since it uses less digits than its factorization.

172328516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43082133 (or 43082131 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 172328516 is about 13127.3956289890. The cubic root of 172328516 is about 556.4836164524.

The spelling of 172328516 in words is "one hundred seventy-two million, three hundred twenty-eight thousand, five hundred sixteen".