172665051 has 16 divisors (see below), whose sum is σ = 254632224. Its totient is φ = 103382784.

The previous prime is 172665037. The next prime is 172665061. The reversal of 172665051 is 150566271.

172665051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172665051 - 2⁷ = 172664923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172665001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58386 + ... + 61271.

It is an arithmetic number, because the mean of its divisors is an integer number (15914514).

Almost surely, 2^172665051 is an apocalyptic number.

172665051 is a deficient number, since it is larger than the sum of its proper divisors (81967173).

172665051 is a wasteful number, since it uses less digits than its factorization.

172665051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119710.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 172665051 is about 13140.2074184542. The cubic root of 172665051 is about 556.8456274178.

The spelling of 172665051 in words is "one hundred seventy-two million, six hundred sixty-five thousand, fifty-one".