86078531 has 32 divisors (see below), whose sum is σ = 119646720. Its totient is φ = 59788800.

The previous prime is 86078527. The next prime is 86078533. The reversal of 86078531 is 13587068.

It is a cyclic number.

It is not a de Polignac number, because 86078531 - 2² = 86078527 is a prime.

It is a super-2 number, since 2×86078531² = 14819026998235922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86078533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23141 + ... + 26601.

It is an arithmetic number, because the mean of its divisors is an integer number (3738960).

Almost surely, 2^86078531 is an apocalyptic number.

86078531 is a deficient number, since it is larger than the sum of its proper divisors (33568189).

86078531 is a wasteful number, since it uses less digits than its factorization.

86078531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 86078531 is about 9277.8516370979. The cubic root of 86078531 is about 441.5348104949.

The spelling of 86078531 in words is "eighty-six million, seventy-eight thousand, five hundred thirty-one".