57125513 has 4 divisors (see below), whose sum is σ = 57172500. Its totient is φ = 57078528.

The previous prime is 57125503. The next prime is 57125527. The reversal of 57125513 is 31552175.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18088009 + 39037504 = 4253^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 57125513 - 2⁶ = 57125449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57125503) 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, 21620 + ... + 24117.

It is an arithmetic number, because the mean of its divisors is an integer number (14293125).

Almost surely, 2^57125513 is an apocalyptic number.

It is an amenable number.

57125513 is a deficient number, since it is larger than the sum of its proper divisors (46987).

57125513 is a wasteful number, since it uses less digits than its factorization.

57125513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46986.

The product of its digits is 5250, while the sum is 29.

The square root of 57125513 is about 7558.1421659029. The cubic root of 57125513 is about 385.1323837764.

Adding to 57125513 its reverse (31552175), we get a palindrome (88677688).

The spelling of 57125513 in words is "fifty-seven million, one hundred twenty-five thousand, five hundred thirteen".