85710531 has 16 divisors (see below), whose sum is σ = 116774784. Its totient is φ = 55906944.

The previous prime is 85710529. The next prime is 85710533. The reversal of 85710531 is 13501758.

It is an interprime number because it is at equal distance from previous prime (85710529) and next prime (85710533).

It is not a de Polignac number, because 85710531 - 2¹ = 85710529 is a prime.

It is a super-2 number, since 2×85710531² = 14692590248603922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85710533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25035 + ... + 28251.

It is an arithmetic number, because the mean of its divisors is an integer number (7298424).

Almost surely, 2^85710531 is an apocalyptic number.

85710531 is a deficient number, since it is larger than the sum of its proper divisors (31064253).

85710531 is a wasteful number, since it uses less digits than its factorization.

85710531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 85710531 is about 9257.9982177574. The cubic root of 85710531 is about 440.9047001769.

The spelling of 85710531 in words is "eighty-five million, seven hundred ten thousand, five hundred thirty-one".