86851215 has 48 divisors (see below), whose sum is σ = 173905056. Its totient is φ = 39628800.

The previous prime is 86851211. The next prime is 86851217. The reversal of 86851215 is 51215868.

It is not a de Polignac number, because 86851215 - 2² = 86851211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86851215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86851211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3255 + ... + 13575.

It is an arithmetic number, because the mean of its divisors is an integer number (3623022).

Almost surely, 2^86851215 is an apocalyptic number.

86851215 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

86851215 is an abundant number, since it is smaller than the sum of its proper divisors (87053841).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86851215 is a wasteful number, since it uses less digits than its factorization.

86851215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360 (or 10357 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 86851215 is about 9319.3999270339. The cubic root of 86851215 is about 442.8520228584.

The spelling of 86851215 in words is "eighty-six million, eight hundred fifty-one thousand, two hundred fifteen".