86515251 has 4 divisors (see below), whose sum is σ = 115353672. Its totient is φ = 57676832.

The previous prime is 86515249. The next prime is 86515267. The reversal of 86515251 is 15251568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86515251 - 2¹ = 86515249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86515201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14419206 + ... + 14419211.

It is an arithmetic number, because the mean of its divisors is an integer number (28838418).

Almost surely, 2^86515251 is an apocalyptic number.

86515251 is a deficient number, since it is larger than the sum of its proper divisors (28838421).

86515251 is a wasteful number, since it uses less digits than its factorization.

86515251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28838420.

The product of its digits is 12000, while the sum is 33.

The square root of 86515251 is about 9301.3574815722. The cubic root of 86515251 is about 442.2802611630.

The spelling of 86515251 in words is "eighty-six million, five hundred fifteen thousand, two hundred fifty-one".