172220051 has 8 divisors (see below), whose sum is σ = 173654640. Its totient is φ = 170790048.

The previous prime is 172220039. The next prime is 172220053. The reversal of 172220051 is 150022271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172220051 - 2²² = 168025747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172220053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134225 + ... + 135501.

It is an arithmetic number, because the mean of its divisors is an integer number (21706830).

Almost surely, 2^172220051 is an apocalyptic number.

172220051 is a deficient number, since it is larger than the sum of its proper divisors (1434589).

172220051 is a wasteful number, since it uses less digits than its factorization.

172220051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 172220051 is about 13123.2637327762. The cubic root of 172220051 is about 556.3668401448.

The spelling of 172220051 in words is "one hundred seventy-two million, two hundred twenty thousand, fifty-one".