172131480 has 112 divisors (see below), whose sum is σ = 580776480. Its totient is φ = 45893952.

The previous prime is 172131473. The next prime is 172131493. The reversal of 172131480 is 84131271.

172131480 is a `hidden beast` number, since 172 + 13 + 1 + 480 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26209 + ... + 32111.

Almost surely, 2^172131480 is an apocalyptic number.

172131480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172131480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290388240).

172131480 is an abundant number, since it is smaller than the sum of its proper divisors (408645000).

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

172131480 is an equidigital number, since it uses as much as digits as its factorization.

172131480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932 (or 5913 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 172131480 is about 13119.8887190403. Note that the first 3 decimals coincide. The cubic root of 172131480 is about 556.2714458760.

The spelling of 172131480 in words is "one hundred seventy-two million, one hundred thirty-one thousand, four hundred eighty".