172131544 has 64 divisors (see below), whose sum is σ = 356610240. Its totient is φ = 77414400.

The previous prime is 172131539. The next prime is 172131577. The reversal of 172131544 is 445131271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139869 + ... + 1140019.

It is an arithmetic number, because the mean of its divisors is an integer number (5572035).

Almost surely, 2^172131544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172131544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178305120).

172131544 is an abundant number, since it is smaller than the sum of its proper divisors (184478696).

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

172131544 is a wasteful number, since it uses less digits than its factorization.

172131544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 376 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 172131544 is about 13119.8911580851. The cubic root of 172131544 is about 556.2715148182.

The spelling of 172131544 in words is "one hundred seventy-two million, one hundred thirty-one thousand, five hundred forty-four".