86521271 has 2 divisors, whose sum is σ = 86521272. Its totient is φ = 86521270.

The previous prime is 86521229. The next prime is 86521301. The reversal of 86521271 is 17212568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86521271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86521871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43260635 + 43260636.

It is an arithmetic number, because the mean of its divisors is an integer number (43260636).

Almost surely, 2^86521271 is an apocalyptic number.

86521271 is a deficient number, since it is larger than the sum of its proper divisors (1).

86521271 is an equidigital number, since it uses as much as digits as its factorization.

86521271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 32.

The square root of 86521271 is about 9301.6810846212. The cubic root of 86521271 is about 442.2905193367.

The spelling of 86521271 in words is "eighty-six million, five hundred twenty-one thousand, two hundred seventy-one".