85177257 has 16 divisors (see below), whose sum is σ = 129282048. Its totient is φ = 49377680.

The previous prime is 85177241. The next prime is 85177271. The reversal of 85177257 is 75277158.

It is not a de Polignac number, because 85177257 - 2⁴ = 85177241 is a prime.

It is a super-2 number, since 2×85177257² = 14510330220088098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85177357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55353 + ... + 56870.

It is an arithmetic number, because the mean of its divisors is an integer number (8080128).

Almost surely, 2^85177257 is an apocalyptic number.

It is an amenable number.

85177257 is a deficient number, since it is larger than the sum of its proper divisors (44104791).

85177257 is a wasteful number, since it uses less digits than its factorization.

85177257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112260.

The product of its digits is 137200, while the sum is 42.

The square root of 85177257 is about 9229.1525613135. The cubic root of 85177257 is about 439.9883898452.

Subtracting from 85177257 its reverse (75277158), we obtain a palindrome (9900099).

The spelling of 85177257 in words is "eighty-five million, one hundred seventy-seven thousand, two hundred fifty-seven".