85563731 has 6 divisors (see below), whose sum is σ = 93375732. Its totient is φ = 77757320.

The previous prime is 85563719. The next prime is 85563739. The reversal of 85563731 is 13736558.

It is not a de Polignac number, because 85563731 - 2¹⁰ = 85562707 is a prime.

It is a super-2 number, since 2×85563731² = 14642304125280722, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (75600) is a multiple of the sum of its prime divisors (2800).

It is not an unprimeable number, because it can be changed into a prime (85563739) 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 5 ways as a sum of consecutive naturals, for example, 29285 + ... + 32073.

It is an arithmetic number, because the mean of its divisors is an integer number (15562622).

Almost surely, 2^85563731 is an apocalyptic number.

85563731 is a deficient number, since it is larger than the sum of its proper divisors (7812001).

85563731 is an frugal number, since it uses more digits than its factorization.

85563731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589 (or 2800 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 85563731 is about 9250.0665403012. The cubic root of 85563731 is about 440.6528377094.

The spelling of 85563731 in words is "eighty-five million, five hundred sixty-three thousand, seven hundred thirty-one".