57172047 has 8 divisors (see below), whose sum is σ = 76268544. Its totient is φ = 38095128.

The previous prime is 57172033. The next prime is 57172061. The reversal of 57172047 is 74027175.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57172033) and next prime (57172061).

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

It is not a de Polignac number, because 57172047 - 2⁸ = 57171791 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 57171999 and 57172017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57172847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4498 + ... + 11600.

It is an arithmetic number, because the mean of its divisors is an integer number (9533568).

Almost surely, 2^57172047 is an apocalyptic number.

57172047 is a deficient number, since it is larger than the sum of its proper divisors (19096497).

57172047 is a wasteful number, since it uses less digits than its factorization.

57172047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9789.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 57172047 is about 7561.2199412529. The cubic root of 57172047 is about 385.2369306785.

The spelling of 57172047 in words is "fifty-seven million, one hundred seventy-two thousand, forty-seven".