172556013 has 32 divisors (see below), whose sum is σ = 275218432. Its totient is φ = 94089600.

The previous prime is 172555997. The next prime is 172556023. The reversal of 172556013 is 310655271.

It is not a de Polignac number, because 172556013 - 2⁴ = 172555997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172556023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45708 + ... + 49338.

It is an arithmetic number, because the mean of its divisors is an integer number (8600576).

Almost surely, 2^172556013 is an apocalyptic number.

It is an amenable number.

172556013 is a deficient number, since it is larger than the sum of its proper divisors (102662419).

172556013 is a wasteful number, since it uses less digits than its factorization.

172556013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 172556013 is about 13136.0577419559. The cubic root of 172556013 is about 556.7283867088.

The spelling of 172556013 in words is "one hundred seventy-two million, five hundred fifty-six thousand, thirteen".