868531515 has 16 divisors (see below), whose sum is σ = 1462790400. Its totient is φ = 438836832.

The previous prime is 868531483. The next prime is 868531571. The reversal of 868531515 is 515135868.

It is not a de Polignac number, because 868531515 - 2⁵ = 868531483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523455 + ... + 1524024.

It is an arithmetic number, because the mean of its divisors is an integer number (91424400).

Almost surely, 2^868531515 is an apocalyptic number.

868531515 is a deficient number, since it is larger than the sum of its proper divisors (594258885).

868531515 is a wasteful number, since it uses less digits than its factorization.

868531515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047506.

The product of its digits is 144000, while the sum is 42.

The square root of 868531515 is about 29470.8587421541. The cubic root of 868531515 is about 954.1028516231.

The spelling of 868531515 in words is "eight hundred sixty-eight million, five hundred thirty-one thousand, five hundred fifteen".