172321132 has 24 divisors (see below), whose sum is σ = 312726960. Its totient is φ = 82985280.

The previous prime is 172321117. The next prime is 172321141. The reversal of 172321132 is 231123271.

It is a happy number.

It is a super-2 number, since 2×172321132² = 59389145067522848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52582 + ... + 55762.

It is an arithmetic number, because the mean of its divisors is an integer number (13030290).

Almost surely, 2^172321132 is an apocalyptic number.

It is an amenable number.

172321132 is a deficient number, since it is larger than the sum of its proper divisors (140405828).

172321132 is a wasteful number, since it uses less digits than its factorization.

172321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681 (or 3679 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 172321132 is about 13127.1143820719. The cubic root of 172321132 is about 556.4756681960.

The spelling of 172321132 in words is "one hundred seventy-two million, three hundred twenty-one thousand, one hundred thirty-two".