85288831 has 2 divisors, whose sum is σ = 85288832. Its totient is φ = 85288830.

The previous prime is 85288799. The next prime is 85288867. The reversal of 85288831 is 13888258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85288831 - 2⁵ = 85288799 is a prime.

It is a super-2 number, since 2×85288831² = 14548369386693122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85288331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42644415 + 42644416.

It is an arithmetic number, because the mean of its divisors is an integer number (42644416).

Almost surely, 2^85288831 is an apocalyptic number.

85288831 is a deficient number, since it is larger than the sum of its proper divisors (1).

85288831 is an equidigital number, since it uses as much as digits as its factorization.

85288831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 43.

The square root of 85288831 is about 9235.1952334534. The cubic root of 85288831 is about 440.1804201554.

The spelling of 85288831 in words is "eighty-five million, two hundred eighty-eight thousand, eight hundred thirty-one".