863813231 has 16 divisors (see below), whose sum is σ = 956738304. Its totient is φ = 775741824.

The previous prime is 863813219. The next prime is 863813257. The reversal of 863813231 is 132318368.

It is not a de Polignac number, because 863813231 - 2²² = 859618927 is a prime.

It is a super-2 number, since 2×863813231² = 1492346596101318722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 863813191 and 863813200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863813201) 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, 170720 + ... + 175706.

It is an arithmetic number, because the mean of its divisors is an integer number (59796144).

Almost surely, 2^863813231 is an apocalyptic number.

863813231 is a deficient number, since it is larger than the sum of its proper divisors (92925073).

863813231 is a wasteful number, since it uses less digits than its factorization.

863813231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470.

The product of its digits is 20736, while the sum is 35.

The square root of 863813231 is about 29390.6997364813. The cubic root of 863813231 is about 952.3719972289.

The spelling of 863813231 in words is "eight hundred sixty-three million, eight hundred thirteen thousand, two hundred thirty-one".