231440204 has 12 divisors (see below), whose sum is σ = 405127800. Its totient is φ = 115689408.

The previous prime is 231440201. The next prime is 231440207. The reversal of 231440204 is 402044132.

It is an interprime number because it is at equal distance from previous prime (231440201) and next prime (231440207).

It is not an unprimeable number, because it can be changed into a prime (231440201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22292 + ... + 30980.

It is an arithmetic number, because the mean of its divisors is an integer number (33760650).

Almost surely, 2^231440204 is an apocalyptic number.

It is an amenable number.

231440204 is a deficient number, since it is larger than the sum of its proper divisors (173687596).

231440204 is a wasteful number, since it uses less digits than its factorization.

231440204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15352 (or 15350 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 231440204 is about 15213.1589093127. The cubic root of 231440204 is about 613.9687513938.

Adding to 231440204 its reverse (402044132), we get a palindrome (633484336).

The spelling of 231440204 in words is "two hundred thirty-one million, four hundred forty thousand, two hundred four".