86519551 has 2 divisors, whose sum is σ = 86519552. Its totient is φ = 86519550.

The previous prime is 86519539. The next prime is 86519561. The reversal of 86519551 is 15591568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86519551 - 2⁷ = 86519423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86519561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43259775 + 43259776.

It is an arithmetic number, because the mean of its divisors is an integer number (43259776).

Almost surely, 2^86519551 is an apocalyptic number.

86519551 is a deficient number, since it is larger than the sum of its proper divisors (1).

86519551 is an equidigital number, since it uses as much as digits as its factorization.

86519551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 40.

The square root of 86519551 is about 9301.5886277560. The cubic root of 86519551 is about 442.2875884785.

The spelling of 86519551 in words is "eighty-six million, five hundred nineteen thousand, five hundred fifty-one".