85257911 has 4 divisors (see below), whose sum is σ = 85361832. Its totient is φ = 85153992.

The previous prime is 85257899. The next prime is 85257917. The reversal of 85257911 is 11975258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11975258 = 2 ⋅5987629.

It is a cyclic number.

It is not a de Polignac number, because 85257911 - 2²² = 81063607 is a prime.

It is a super-2 number, since 2×85257911² = 14537822776167842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85257917) 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, 50720 + ... + 52373.

It is an arithmetic number, because the mean of its divisors is an integer number (21340458).

Almost surely, 2^85257911 is an apocalyptic number.

85257911 is a deficient number, since it is larger than the sum of its proper divisors (103921).

85257911 is a wasteful number, since it uses less digits than its factorization.

85257911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103920.

The product of its digits is 25200, while the sum is 38.

The square root of 85257911 is about 9233.5210510401. The cubic root of 85257911 is about 440.1272204437.

It can be divided in two parts, 85257 and 911, that added together give a palindrome (86168).

The spelling of 85257911 in words is "eighty-five million, two hundred fifty-seven thousand, nine hundred eleven".