86855251 has 16 divisors (see below), whose sum is σ = 104774400. Its totient is φ = 70335648.

The previous prime is 86855239. The next prime is 86855269. The reversal of 86855251 is 15255868.

It is a cyclic number.

It is not a de Polignac number, because 86855251 - 2²¹ = 84758099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86855231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67056 + ... + 68338.

It is an arithmetic number, because the mean of its divisors is an integer number (6548400).

Almost surely, 2^86855251 is an apocalyptic number.

86855251 is a deficient number, since it is larger than the sum of its proper divisors (17919149).

86855251 is a wasteful number, since it uses less digits than its factorization.

86855251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818.

The product of its digits is 96000, while the sum is 40.

The square root of 86855251 is about 9319.6164620654. The cubic root of 86855251 is about 442.8588825708.

The spelling of 86855251 in words is "eighty-six million, eight hundred fifty-five thousand, two hundred fifty-one".