172565212330 has 64 divisors (see below), whose sum is σ = 361602040320. Its totient is φ = 58073140224.

The previous prime is 172565212321. The next prime is 172565212373. The reversal of 172565212330 is 33212565271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172565212330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 752419 + ... + 954601.

It is an arithmetic number, because the mean of its divisors is an integer number (5650031880).

Almost surely, 2^172565212330 is an apocalyptic number.

172565212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172565212330 is an abundant number, since it is smaller than the sum of its proper divisors (189036827990).

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

172565212330 is a wasteful number, since it uses less digits than its factorization.

172565212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202423.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 172565212330 in words is "one hundred seventy-two billion, five hundred sixty-five million, two hundred twelve thousand, three hundred thirty".