85310881 has 2 divisors, whose sum is σ = 85310882. Its totient is φ = 85310880.

The previous prime is 85310857. The next prime is 85310891. The reversal of 85310881 is 18801358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43824400 + 41486481 = 6620^2 + 6441^2 .

It is a cyclic number.

It is not a de Polignac number, because 85310881 - 2¹¹ = 85308833 is a prime.

It is a super-2 number, since 2×85310881² = 14555892833992322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85310851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42655440 + 42655441.

It is an arithmetic number, because the mean of its divisors is an integer number (42655441).

Almost surely, 2^85310881 is an apocalyptic number.

It is an amenable number.

85310881 is a deficient number, since it is larger than the sum of its proper divisors (1).

85310881 is an equidigital number, since it uses as much as digits as its factorization.

85310881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 85310881 is about 9236.3889588951. The cubic root of 85310881 is about 440.2183506473.

The spelling of 85310881 in words is "eighty-five million, three hundred ten thousand, eight hundred eighty-one".