85130057 has 4 divisors (see below), whose sum is σ = 85184196. Its totient is φ = 85075920.

The previous prime is 85130041. The next prime is 85130069. The reversal of 85130057 is 75003158.

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 51998521 + 33131536 = 7211^2 + 5756^2 .

It is a cyclic number.

It is not a de Polignac number, because 85130057 - 2⁴ = 85130041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85130257) 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, 24638 + ... + 27879.

It is an arithmetic number, because the mean of its divisors is an integer number (21296049).

Almost surely, 2^85130057 is an apocalyptic number.

It is an amenable number.

85130057 is a deficient number, since it is larger than the sum of its proper divisors (54139).

85130057 is a wasteful number, since it uses less digits than its factorization.

85130057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54138.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 85130057 is about 9226.5950924488. The cubic root of 85130057 is about 439.9071033221.

The spelling of 85130057 in words is "eighty-five million, one hundred thirty thousand, fifty-seven".