231218803 has 16 divisors (see below), whose sum is σ = 244589184. Its totient is φ = 218327040.

The previous prime is 231218797. The next prime is 231218831. The reversal of 231218803 is 308812132.

231218803 = 317² + 318² + ... + 898².

It is a cyclic number.

It is not a de Polignac number, because 231218803 - 2²⁵ = 197664371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231218833) 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, 186301 + ... + 187537.

It is an arithmetic number, because the mean of its divisors is an integer number (15286824).

Almost surely, 2^231218803 is an apocalyptic number.

231218803 is a deficient number, since it is larger than the sum of its proper divisors (13370381).

231218803 is a wasteful number, since it uses less digits than its factorization.

231218803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 231218803 is about 15205.8805401068. The cubic root of 231218803 is about 613.7729100752.

It can be divided in two parts, 2312 and 18803, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 231218803 in words is "two hundred thirty-one million, two hundred eighteen thousand, eight hundred three".