231304311 has 12 divisors (see below), whose sum is σ = 381835792. Its totient is φ = 132173856.

The previous prime is 231304303. The next prime is 231304313. The reversal of 231304311 is 113403132.

231304311 is a `hidden beast` number, since 231 + 3 + 0 + 431 + 1 = 666.

It is not a de Polignac number, because 231304311 - 2³ = 231304303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231304313) 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, 1835686 + ... + 1835811.

Almost surely, 2^231304311 is an apocalyptic number.

231304311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231304311 is a deficient number, since it is larger than the sum of its proper divisors (150531481).

231304311 is a wasteful number, since it uses less digits than its factorization.

231304311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671510 (or 3671507 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 231304311 is about 15208.6919555891. The cubic root of 231304311 is about 613.8485613991.

Adding to 231304311 its reverse (113403132), we get a palindrome (344707443).

The spelling of 231304311 in words is "two hundred thirty-one million, three hundred four thousand, three hundred eleven".