85285731 has 8 divisors (see below), whose sum is σ = 114395904. Its totient is φ = 56516360.

The previous prime is 85285693. The next prime is 85285757. The reversal of 85285731 is 13758258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85285731 - 2⁶ = 85285667 is a prime.

It is a super-2 number, since 2×85285731² = 14547311824408722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85285731.

It is not an unprimeable number, because it can be changed into a prime (85285531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84615 + ... + 85616.

It is an arithmetic number, because the mean of its divisors is an integer number (14299488).

Almost surely, 2^85285731 is an apocalyptic number.

85285731 is a deficient number, since it is larger than the sum of its proper divisors (29110173).

85285731 is a wasteful number, since it uses less digits than its factorization.

85285731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170401.

The product of its digits is 67200, while the sum is 39.

The square root of 85285731 is about 9235.0273957363. The cubic root of 85285731 is about 440.1750869997.

The spelling of 85285731 in words is "eighty-five million, two hundred eighty-five thousand, seven hundred thirty-one".