86187551 has 2 divisors, whose sum is σ = 86187552. Its totient is φ = 86187550.

The previous prime is 86187529. The next prime is 86187557. The reversal of 86187551 is 15578168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86187551 - 2¹⁴ = 86171167 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 86187499 and 86187508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86187557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43093775 + 43093776.

It is an arithmetic number, because the mean of its divisors is an integer number (43093776).

Almost surely, 2^86187551 is an apocalyptic number.

86187551 is a deficient number, since it is larger than the sum of its proper divisors (1).

86187551 is an equidigital number, since it uses as much as digits as its factorization.

86187551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 41.

The square root of 86187551 is about 9283.7250605562. The cubic root of 86187551 is about 441.7211357687.

The spelling of 86187551 in words is "eighty-six million, one hundred eighty-seven thousand, five hundred fifty-one".