86815243 has 8 divisors (see below), whose sum is σ = 92033712. Its totient is φ = 81609216.

The previous prime is 86815229. The next prime is 86815259. The reversal of 86815243 is 34251868.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86815243 - 2⁹ = 86814731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86815213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13996 + ... + 19222.

It is an arithmetic number, because the mean of its divisors is an integer number (11504214).

Almost surely, 2^86815243 is an apocalyptic number.

86815243 is a deficient number, since it is larger than the sum of its proper divisors (5218469).

86815243 is a wasteful number, since it uses less digits than its factorization.

86815243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221.

The product of its digits is 46080, while the sum is 37.

The square root of 86815243 is about 9317.4697745686. The cubic root of 86815243 is about 442.7908743268.

It can be divided in two parts, 8681 and 5243, that added together give a square (13924 = 118²).

The spelling of 86815243 in words is "eighty-six million, eight hundred fifteen thousand, two hundred forty-three".