85287233 has 2 divisors, whose sum is σ = 85287234. Its totient is φ = 85287232.

The previous prime is 85287217. The next prime is 85287247. The reversal of 85287233 is 33278258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76335169 + 8952064 = 8737^2 + 2992^2 .

It is a cyclic number.

It is not a de Polignac number, because 85287233 - 2⁴ = 85287217 is a prime.

It is a super-2 number, since 2×85287233² = 14547824225592578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85287263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42643616 + 42643617.

It is an arithmetic number, because the mean of its divisors is an integer number (42643617).

Almost surely, 2^85287233 is an apocalyptic number.

It is an amenable number.

85287233 is a deficient number, since it is larger than the sum of its proper divisors (1).

85287233 is an equidigital number, since it uses as much as digits as its factorization.

85287233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 85287233 is about 9235.1087161982. The cubic root of 85287233 is about 440.1776710158.

The spelling of 85287233 in words is "eighty-five million, two hundred eighty-seven thousand, two hundred thirty-three".