86812507531 has 2 divisors, whose sum is σ = 86812507532. Its totient is φ = 86812507530.

The previous prime is 86812507493. The next prime is 86812507543. The reversal of 86812507531 is 13570521868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86812507531 - 2¹⁷ = 86812376459 is a prime.

It is a super-2 number, since 2×86812507531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86812507931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43406253765 + 43406253766.

It is an arithmetic number, because the mean of its divisors is an integer number (43406253766).

Almost surely, 2^86812507531 is an apocalyptic number.

86812507531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86812507531 is an equidigital number, since it uses as much as digits as its factorization.

86812507531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 86812507531 in words is "eighty-six billion, eight hundred twelve million, five hundred seven thousand, five hundred thirty-one".