85287231 has 48 divisors (see below), whose sum is σ = 134184960. Its totient is φ = 52073280.

The previous prime is 85287217. The next prime is 85287233. The reversal of 85287231 is 13278258.

85287231 = 50³ + 51³ + ... + 136³.

It is not a de Polignac number, because 85287231 - 2¹⁰ = 85286207 is a prime.

It is a super-2 number, since 2×85287231² = 14547823543294722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85287233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671490 + ... + 671616.

It is an arithmetic number, because the mean of its divisors is an integer number (2795520).

Almost surely, 2^85287231 is an apocalyptic number.

85287231 is a deficient number, since it is larger than the sum of its proper divisors (48897729).

85287231 is a wasteful number, since it uses less digits than its factorization.

85287231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 85287231 is about 9235.1086079158. The cubic root of 85287231 is about 440.1776675750.

The spelling of 85287231 in words is "eighty-five million, two hundred eighty-seven thousand, two hundred thirty-one".