85539231 has 12 divisors (see below), whose sum is σ = 128929008. Its totient is φ = 54546624.

The previous prime is 85539217. The next prime is 85539239. The reversal of 85539231 is 13293558.

It is not a de Polignac number, because 85539231 - 2¹⁴ = 85522847 is a prime.

It is a super-2 number, since 2×85539231² = 14633920080142722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85539239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206410 + ... + 206823.

It is an arithmetic number, because the mean of its divisors is an integer number (10744084).

Almost surely, 2^85539231 is an apocalyptic number.

85539231 is a deficient number, since it is larger than the sum of its proper divisors (43389777).

85539231 is a wasteful number, since it uses less digits than its factorization.

85539231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413262 (or 413259 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 85539231 is about 9248.7421306900. The cubic root of 85539231 is about 440.6107753971.

The spelling of 85539231 in words is "eighty-five million, five hundred thirty-nine thousand, two hundred thirty-one".