85998331 has 4 divisors (see below), whose sum is σ = 86018872. Its totient is φ = 85977792.

The previous prime is 85998329. The next prime is 85998337. The reversal of 85998331 is 13389958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13389958 = 2 ⋅6694979.

It is a cyclic number.

It is not a de Polignac number, because 85998331 - 2¹ = 85998329 is a prime.

It is a super-2 number, since 2×85998331² = 14791425869571122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85998337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485 + ... + 13198.

It is an arithmetic number, because the mean of its divisors is an integer number (21504718).

Almost surely, 2^85998331 is an apocalyptic number.

85998331 is a deficient number, since it is larger than the sum of its proper divisors (20541).

85998331 is a wasteful number, since it uses less digits than its factorization.

85998331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20540.

The product of its digits is 233280, while the sum is 46.

The square root of 85998331 is about 9273.5285086099. The cubic root of 85998331 is about 441.3976408094.

The spelling of 85998331 in words is "eighty-five million, nine hundred ninety-eight thousand, three hundred thirty-one".