85139215 has 48 divisors (see below), whose sum is σ = 128537280. Its totient is φ = 53813760.

The previous prime is 85139207. The next prime is 85139227. The reversal of 85139215 is 51293158.

It is not a de Polignac number, because 85139215 - 2³ = 85139207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163155 + ... + 163675.

It is an arithmetic number, because the mean of its divisors is an integer number (2677860).

Almost surely, 2^85139215 is an apocalyptic number.

85139215 is a deficient number, since it is larger than the sum of its proper divisors (43398065).

85139215 is a wasteful number, since it uses less digits than its factorization.

85139215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 585 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 85139215 is about 9227.0913618540. The cubic root of 85139215 is about 439.9228773230.

The spelling of 85139215 in words is "eighty-five million, one hundred thirty-nine thousand, two hundred fifteen".