86531825 has 6 divisors (see below), whose sum is σ = 107299494. Its totient is φ = 69225440.

The previous prime is 86531821. The next prime is 86531843. The reversal of 86531825 is 52813568.

It can be written as a sum of positive squares in 3 ways, for example, as 7268416 + 79263409 = 2696^2 + 8903^2 .

It is not a de Polignac number, because 86531825 - 2² = 86531821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86531821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1730612 + ... + 1730661.

It is an arithmetic number, because the mean of its divisors is an integer number (17883249).

Almost surely, 2^86531825 is an apocalyptic number.

It is an amenable number.

86531825 is a deficient number, since it is larger than the sum of its proper divisors (20767669).

86531825 is a wasteful number, since it uses less digits than its factorization.

86531825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461283 (or 3461278 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 86531825 is about 9302.2483841274. The cubic root of 86531825 is about 442.3085023687.

The spelling of 86531825 in words is "eighty-six million, five hundred thirty-one thousand, eight hundred twenty-five".