86312251 has 2 divisors, whose sum is σ = 86312252. Its totient is φ = 86312250.

The previous prime is 86312197. The next prime is 86312321. The reversal of 86312251 is 15221368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86312251 - 2¹⁵ = 86279483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86312851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43156125 + 43156126.

It is an arithmetic number, because the mean of its divisors is an integer number (43156126).

Almost surely, 2^86312251 is an apocalyptic number.

86312251 is a deficient number, since it is larger than the sum of its proper divisors (1).

86312251 is an equidigital number, since it uses as much as digits as its factorization.

86312251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 86312251 is about 9290.4386871665. The cubic root of 86312251 is about 441.9340670679.

The spelling of 86312251 in words is "eighty-six million, three hundred twelve thousand, two hundred fifty-one".