86231851 has 2 divisors, whose sum is σ = 86231852. Its totient is φ = 86231850.

The previous prime is 86231791. The next prime is 86231869. The reversal of 86231851 is 15813268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86231851 - 2⁷ = 86231723 is a prime.

It is not a weakly prime, because it can be changed into another prime (86231051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43115925 + 43115926.

It is an arithmetic number, because the mean of its divisors is an integer number (43115926).

Almost surely, 2^86231851 is an apocalyptic number.

86231851 is a deficient number, since it is larger than the sum of its proper divisors (1).

86231851 is an equidigital number, since it uses as much as digits as its factorization.

86231851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 86231851 is about 9286.1106497823. The cubic root of 86231851 is about 441.7968036750.

The spelling of 86231851 in words is "eighty-six million, two hundred thirty-one thousand, eight hundred fifty-one".