85310561 has 4 divisors (see below), whose sum is σ = 97497792. Its totient is φ = 73123332.

The previous prime is 85310557. The next prime is 85310587. The reversal of 85310561 is 16501358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85310561 - 2² = 85310557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85310521) 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 in 3 ways as a sum of consecutive naturals, for example, 6093605 + ... + 6093618.

It is an arithmetic number, because the mean of its divisors is an integer number (24374448).

Almost surely, 2^85310561 is an apocalyptic number.

It is an amenable number.

85310561 is a deficient number, since it is larger than the sum of its proper divisors (12187231).

85310561 is a wasteful number, since it uses less digits than its factorization.

85310561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12187230.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 85310561 is about 9236.3716360917. The cubic root of 85310561 is about 440.2178002288.

The spelling of 85310561 in words is "eighty-five million, three hundred ten thousand, five hundred sixty-one".