172655051 has 4 divisors (see below), whose sum is σ = 173371704. Its totient is φ = 171938400.

The previous prime is 172655039. The next prime is 172655069. The reversal of 172655051 is 150556271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172655051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172654999 and 172655017.

It is not an unprimeable number, because it can be changed into a prime (172655011) 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, 357965 + ... + 358446.

It is an arithmetic number, because the mean of its divisors is an integer number (43342926).

Almost surely, 2^172655051 is an apocalyptic number.

172655051 is a deficient number, since it is larger than the sum of its proper divisors (716653).

172655051 is an equidigital number, since it uses as much as digits as its factorization.

172655051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716652.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 172655051 is about 13139.8269014474. The cubic root of 172655051 is about 556.8348771941.

The spelling of 172655051 in words is "one hundred seventy-two million, six hundred fifty-five thousand, fifty-one".