86051531 has 2 divisors, whose sum is σ = 86051532. Its totient is φ = 86051530.

The previous prime is 86051521. The next prime is 86051549. The reversal of 86051531 is 13515068.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86051531 - 2¹⁰ = 86050507 is a prime.

It is a super-2 number, since 2×86051531² = 14809731974887922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86051494 and 86051503.

It is not a weakly prime, because it can be changed into another prime (86051521) 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 as a sum of consecutive naturals, namely, 43025765 + 43025766.

It is an arithmetic number, because the mean of its divisors is an integer number (43025766).

Almost surely, 2^86051531 is an apocalyptic number.

86051531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86051531 is an equidigital number, since it uses as much as digits as its factorization.

86051531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 86051531 is about 9276.3964447408. The cubic root of 86051531 is about 441.4886406915.

Adding to 86051531 its reverse (13515068), we get a palindrome (99566599).

The spelling of 86051531 in words is "eighty-six million, fifty-one thousand, five hundred thirty-one".