172381568 has 32 divisors (see below), whose sum is σ = 355266000. Its totient is φ = 83216896.

The previous prime is 172381567. The next prime is 172381637. The reversal of 172381568 is 865183271.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×172381568² = 59430809972277248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172381567) 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, 19508 + ... + 26931.

Almost surely, 2^172381568 is an apocalyptic number.

It is an amenable number.

172381568 is an abundant number, since it is smaller than the sum of its proper divisors (182884432).

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

172381568 is an equidigital number, since it uses as much as digits as its factorization.

172381568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46482 (or 46470 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 172381568 is about 13129.4161332483. The cubic root of 172381568 is about 556.5407158045.

The spelling of 172381568 in words is "one hundred seventy-two million, three hundred eighty-one thousand, five hundred sixty-eight".