85258331 has 2 divisors, whose sum is σ = 85258332. Its totient is φ = 85258330.

The previous prime is 85258321. The next prime is 85258333. The reversal of 85258331 is 13385258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85258331 - 2¹⁰ = 85257307 is a prime.

It is a super-2 number, since 2×85258331² = 14537966009811122, which contains 22 as substring.

Together with 85258333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85258291 and 85258300.

It is not a weakly prime, because it can be changed into another prime (85258333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42629165 + 42629166.

It is an arithmetic number, because the mean of its divisors is an integer number (42629166).

Almost surely, 2^85258331 is an apocalyptic number.

85258331 is a deficient number, since it is larger than the sum of its proper divisors (1).

85258331 is an equidigital number, since it uses as much as digits as its factorization.

85258331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The square root of 85258331 is about 9233.5437942320. The cubic root of 85258331 is about 440.1279431650.

The spelling of 85258331 in words is "eighty-five million, two hundred fifty-eight thousand, three hundred thirty-one".