172522872 has 40 divisors (see below), whose sum is σ = 483225600. Its totient is φ = 57507408.

The previous prime is 172522813. The next prime is 172522879. The reversal of 172522872 is 278225271.

172522872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172522879) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 132472 + ... + 133767.

It is an arithmetic number, because the mean of its divisors is an integer number (12080640).

Almost surely, 2^172522872 is an apocalyptic number.

172522872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172522872 is an abundant number, since it is smaller than the sum of its proper divisors (310702728).

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

172522872 is a wasteful number, since it uses less digits than its factorization.

172522872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266257 (or 266244 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 172522872 is about 13134.7962298621. The cubic root of 172522872 is about 556.6927427915.

It can be divided in two parts, 17 and 2522872, that multiplied together give a palindrome (42888824).

The spelling of 172522872 in words is "one hundred seventy-two million, five hundred twenty-two thousand, eight hundred seventy-two".