172313057 has 6 divisors (see below), whose sum is σ = 200445858. Its totient is φ = 147696864.

The previous prime is 172313051. The next prime is 172313059. The reversal of 172313057 is 750313271.

It can be written as a sum of positive squares in only one way, i.e., 171898321 + 414736 = 13111^2 + 644^2 .

It is not a de Polignac number, because 172313057 - 2⁶ = 172312993 is a prime.

It is a super-2 number, since 2×172313057² = 59383579225370498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172313051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1758248 + ... + 1758345.

It is an arithmetic number, because the mean of its divisors is an integer number (33407643).

Almost surely, 2^172313057 is an apocalyptic number.

It is an amenable number.

172313057 is a deficient number, since it is larger than the sum of its proper divisors (28132801).

172313057 is an equidigital number, since it uses as much as digits as its factorization.

172313057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516607 (or 3516600 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 172313057 is about 13126.8068089692. The cubic root of 172313057 is about 556.4669758761.

The spelling of 172313057 in words is "one hundred seventy-two million, three hundred thirteen thousand, fifty-seven".