85312565 has 32 divisors (see below), whose sum is σ = 119253120. Its totient is φ = 58040064.

The previous prime is 85312529. The next prime is 85312583. The reversal of 85312565 is 56521358.

It is a cyclic number.

It is not a de Polignac number, because 85312565 - 2¹² = 85308469 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44762 + ... + 46628.

It is an arithmetic number, because the mean of its divisors is an integer number (3726660).

Almost surely, 2^85312565 is an apocalyptic number.

It is an amenable number.

85312565 is a deficient number, since it is larger than the sum of its proper divisors (33940555).

85312565 is a wasteful number, since it uses less digits than its factorization.

85312565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its digits is 36000, while the sum is 35.

The square root of 85312565 is about 9236.4801196127. The cubic root of 85312565 is about 440.2212472017.

The spelling of 85312565 in words is "eighty-five million, three hundred twelve thousand, five hundred sixty-five".