57172501 has 8 divisors (see below), whose sum is σ = 60488000. Its totient is φ = 53887680.

The previous prime is 57172483. The next prime is 57172559. The reversal of 57172501 is 10527175.

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

It is a 3-Lehmer number, since φ(57172501) divides (57172501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 57172501 - 2⁵ = 57172469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57172501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57172201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3780 + ... + 11341.

It is an arithmetic number, because the mean of its divisors is an integer number (7561000).

It is a Poulet number, since it divides 2^57172500-1.

Almost surely, 2^57172501 is an apocalyptic number.

57172501 is the 3781-st decagonal number.

It is an amenable number.

57172501 is a deficient number, since it is larger than the sum of its proper divisors (3315499).

57172501 is a wasteful number, since it uses less digits than its factorization.

57172501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15339.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 57172501 is about 7561.2499628038. The cubic root of 57172501 is about 385.2379503907.

Adding to 57172501 its reverse (10527175), we get a palindrome (67699676).

The spelling of 57172501 in words is "fifty-seven million, one hundred seventy-two thousand, five hundred one".