85499931 has 12 divisors (see below), whose sum is σ = 125306216. Its totient is φ = 51817920.

The previous prime is 85499903. The next prime is 85499941. The reversal of 85499931 is 13999458.

It is not a de Polignac number, because 85499931 - 2⁵ = 85499899 is a prime.

It is a super-2 number, since 2×85499931² = 14620476402009522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85499941) 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, 117406 + ... + 118131.

Almost surely, 2^85499931 is an apocalyptic number.

85499931 is a deficient number, since it is larger than the sum of its proper divisors (39806285).

85499931 is a wasteful number, since it uses less digits than its factorization.

85499931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235562 (or 235551 counting only the distinct ones).

The product of its digits is 349920, while the sum is 48.

The square root of 85499931 is about 9246.6172733600. The cubic root of 85499931 is about 440.5432872367.

The spelling of 85499931 in words is "eighty-five million, four hundred ninety-nine thousand, nine hundred thirty-one".