57081513 has 8 divisors (see below), whose sum is σ = 76154848. Its totient is φ = 38031264.

The previous prime is 57081503. The next prime is 57081517. The reversal of 57081513 is 31518075.

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

It is not a de Polignac number, because 57081513 - 2⁶ = 57081449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57081517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 10752.

It is an arithmetic number, because the mean of its divisors is an integer number (9519356).

Almost surely, 2^57081513 is an apocalyptic number.

It is an amenable number.

57081513 is a deficient number, since it is larger than the sum of its proper divisors (19073335).

57081513 is a wasteful number, since it uses less digits than its factorization.

57081513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 57081513 is about 7555.2308369765. The cubic root of 57081513 is about 385.0334777208.

Adding to 57081513 its reverse (31518075), we get a palindrome (88599588).

The spelling of 57081513 in words is "fifty-seven million, eighty-one thousand, five hundred thirteen".