57255517 has 4 divisors (see below), whose sum is σ = 62460576. Its totient is φ = 52050460.

The previous prime is 57255509. The next prime is 57255553. The reversal of 57255517 is 71555275.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 57255517 - 2³ = 57255509 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 (57255017) 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, 2602513 + ... + 2602534.

It is an arithmetic number, because the mean of its divisors is an integer number (15615144).

Almost surely, 2^57255517 is an apocalyptic number.

It is an amenable number.

57255517 is a deficient number, since it is larger than the sum of its proper divisors (5205059).

57255517 is a wasteful number, since it uses less digits than its factorization.

57255517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205058.

The product of its digits is 61250, while the sum is 37.

The square root of 57255517 is about 7566.7375400499. The cubic root of 57255517 is about 385.4243188170.

The spelling of 57255517 in words is "fifty-seven million, two hundred fifty-five thousand, five hundred seventeen".