868845531 has 16 divisors (see below), whose sum is σ = 1186437888. Its totient is φ = 565404000.

The previous prime is 868845517. The next prime is 868845553. The reversal of 868845531 is 135548868.

It is not a de Polignac number, because 868845531 - 2⁷ = 868845403 is a prime.

It is a super-2 number, since 2×868845531² = 1509785113477343922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (868845511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1320 + ... + 41706.

It is an arithmetic number, because the mean of its divisors is an integer number (74152368).

Almost surely, 2^868845531 is an apocalyptic number.

868845531 is a deficient number, since it is larger than the sum of its proper divisors (317592357).

868845531 is a wasteful number, since it uses less digits than its factorization.

868845531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40562.

The product of its digits is 921600, while the sum is 48.

The square root of 868845531 is about 29476.1858285634. The cubic root of 868845531 is about 954.2178224891.

The spelling of 868845531 in words is "eight hundred sixty-eight million, eight hundred forty-five thousand, five hundred thirty-one".