85228331 has 4 divisors (see below), whose sum is σ = 87977664. Its totient is φ = 82479000.

The previous prime is 85228313. The next prime is 85228333. The reversal of 85228331 is 13382258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13382258 = 2 ⋅6691129.

It is a cyclic number.

It is not a de Polignac number, because 85228331 - 2²² = 81034027 is a prime.

It is a super-2 number, since 2×85228331² = 14527736810091122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85228333) 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, 1374620 + ... + 1374681.

It is an arithmetic number, because the mean of its divisors is an integer number (21994416).

Almost surely, 2^85228331 is an apocalyptic number.

85228331 is a deficient number, since it is larger than the sum of its proper divisors (2749333).

85228331 is a wasteful number, since it uses less digits than its factorization.

85228331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749332.

The product of its digits is 11520, while the sum is 32.

The square root of 85228331 is about 9231.9191395939. The cubic root of 85228331 is about 440.0763142425.

The spelling of 85228331 in words is "eighty-five million, two hundred twenty-eight thousand, three hundred thirty-one".