86538515 has 32 divisors (see below), whose sum is σ = 125190144. Its totient is φ = 56171520.

The previous prime is 86538511. The next prime is 86538541. The reversal of 86538515 is 51583568.

It is not a de Polignac number, because 86538515 - 2² = 86538511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86538511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50147 + ... + 51843.

It is an arithmetic number, because the mean of its divisors is an integer number (3912192).

Almost surely, 2^86538515 is an apocalyptic number.

86538515 is a deficient number, since it is larger than the sum of its proper divisors (38651629).

86538515 is a wasteful number, since it uses less digits than its factorization.

86538515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its digits is 144000, while the sum is 41.

The square root of 86538515 is about 9302.6079676615. The cubic root of 86538515 is about 442.3199007478.

The spelling of 86538515 in words is "eighty-six million, five hundred thirty-eight thousand, five hundred fifteen".