172515072 has 36 divisors (see below), whose sum is σ = 459143720. Its totient is φ = 57504768.

The previous prime is 172515071. The next prime is 172515103. The reversal of 172515072 is 270515271.

It is a super-2 number, since 2×172515072² = 59522900134330368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172515071) 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, 111547 + ... + 113082.

Almost surely, 2^172515072 is an apocalyptic number.

172515072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172515072 is an abundant number, since it is smaller than the sum of its proper divisors (286628648).

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

172515072 is an equidigital number, since it uses as much as digits as its factorization.

172515072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224648 (or 224634 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 172515072 is about 13134.4993052647. The cubic root of 172515072 is about 556.6843530462.

The spelling of 172515072 in words is "one hundred seventy-two million, five hundred fifteen thousand, seventy-two".