57135230581 has 32 divisors (see below), whose sum is σ = 71090772480. Its totient is φ = 45143179200.

The previous prime is 57135230567. The next prime is 57135230597. The reversal of 57135230581 is 18503253175.

It is not a de Polignac number, because 57135230581 - 2⁹ = 57135230069 is a prime.

It is a super-2 number, since 2×57135230581² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57135230531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378366 + ... + 507376.

It is an arithmetic number, because the mean of its divisors is an integer number (2221586640).

Almost surely, 2^57135230581 is an apocalyptic number.

It is an amenable number.

57135230581 is a deficient number, since it is larger than the sum of its proper divisors (13955541899).

57135230581 is a wasteful number, since it uses less digits than its factorization.

57135230581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129217.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 57135230581 in words is "fifty-seven billion, one hundred thirty-five million, two hundred thirty thousand, five hundred eighty-one".