85869015 has 16 divisors (see below), whose sum is σ = 137788128. Its totient is φ = 45664256.

The previous prime is 85869011. The next prime is 85869031. The reversal of 85869015 is 51096858.

It is a cyclic number.

It is not a de Polignac number, because 85869015 - 2² = 85869011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85869011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2814 + ... + 13403.

It is an arithmetic number, because the mean of its divisors is an integer number (8611758).

Almost surely, 2^85869015 is an apocalyptic number.

85869015 is a deficient number, since it is larger than the sum of its proper divisors (51919113).

85869015 is a wasteful number, since it uses less digits than its factorization.

85869015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 85869015 is about 9266.5535664561. The cubic root of 85869015 is about 441.1762860810.

It can be divided in two parts, 858690 and 15, that multiplied together give a triangular number (12880350 = T₅₀₇₅).

The spelling of 85869015 in words is "eighty-five million, eight hundred sixty-nine thousand, fifteen".