172122152 has 16 divisors (see below), whose sum is σ = 323988660. Its totient is φ = 85725184.

The previous prime is 172122151. The next prime is 172122157. The reversal of 172122152 is 251221271.

It can be written as a sum of positive squares in 2 ways, for example, as 104980516 + 67141636 = 10246^2 + 8194^2 .

It is a super-2 number, since 2×172122152² = 59252070418222208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172122151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39803 + ... + 43914.

Almost surely, 2^172122152 is an apocalyptic number.

It is an amenable number.

172122152 is a deficient number, since it is larger than the sum of its proper divisors (151866508).

172122152 is a wasteful number, since it uses less digits than its factorization.

172122152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83980 (or 83976 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 172122152 is about 13119.5332234039. The cubic root of 172122152 is about 556.2613973678.

The spelling of 172122152 in words is "one hundred seventy-two million, one hundred twenty-two thousand, one hundred fifty-two".