85310557 has 2 divisors, whose sum is σ = 85310558. Its totient is φ = 85310556.

The previous prime is 85310531. The next prime is 85310587. The reversal of 85310557 is 75501358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71723961 + 13586596 = 8469^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 85310557 - 2⁷ = 85310429 is a prime.

It is a super-2 number, since 2×85310557² = 14555782271300498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85310507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42655278 + 42655279.

It is an arithmetic number, because the mean of its divisors is an integer number (42655279).

Almost surely, 2^85310557 is an apocalyptic number.

It is an amenable number.

85310557 is a deficient number, since it is larger than the sum of its proper divisors (1).

85310557 is an equidigital number, since it uses as much as digits as its factorization.

85310557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 85310557 is about 9236.3714195565. The cubic root of 85310557 is about 440.2177933486.

The spelling of 85310557 in words is "eighty-five million, three hundred ten thousand, five hundred fifty-seven".