172331653 has 12 divisors (see below), whose sum is σ = 195875148. Its totient is φ = 150698880.

The previous prime is 172331647. The next prime is 172331699. The reversal of 172331653 is 356133271.

It can be written as a sum of positive squares in 2 ways, for example, as 6874884 + 165456769 = 2622^2 + 12863^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172331653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172331603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13668 + ... + 23053.

It is an arithmetic number, because the mean of its divisors is an integer number (16322929).

Almost surely, 2^172331653 is an apocalyptic number.

172331653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172331653 is a deficient number, since it is larger than the sum of its proper divisors (23543495).

172331653 is a wasteful number, since it uses less digits than its factorization.

172331653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36772 (or 36753 counting only the distinct ones).

The product of its digits is 11340, while the sum is 31.

The square root of 172331653 is about 13127.5151113987. The cubic root of 172331653 is about 556.4869931010.

The spelling of 172331653 in words is "one hundred seventy-two million, three hundred thirty-one thousand, six hundred fifty-three".