863120331 has 12 divisors (see below), whose sum is σ = 1265338152. Its totient is φ = 566824896.

The previous prime is 863120303. The next prime is 863120339. The reversal of 863120331 is 133021368.

It is a happy number.

863120331 is a `hidden beast` number, since 8 + 631 + 20 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 863120331 - 2¹¹ = 863118283 is a prime.

It is a super-2 number, since 2×863120331² = 1489953411571099122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 863120295 and 863120304.

It is not an unprimeable number, because it can be changed into a prime (863120339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715086 + ... + 716291.

It is an arithmetic number, because the mean of its divisors is an integer number (105444846).

Almost surely, 2^863120331 is an apocalyptic number.

863120331 is a deficient number, since it is larger than the sum of its proper divisors (402217821).

863120331 is a wasteful number, since it uses less digits than its factorization.

863120331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431450 (or 1431447 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 863120331 is about 29378.9096291881. The cubic root of 863120331 is about 952.1172835726.

Adding to 863120331 its reverse (133021368), we get a palindrome (996141699).

The spelling of 863120331 in words is "eight hundred sixty-three million, one hundred twenty thousand, three hundred thirty-one".