231340144 has 40 divisors (see below), whose sum is σ = 512967168. Its totient is φ = 99007680.

The previous prime is 231340127. The next prime is 231340147. The reversal of 231340144 is 441043132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231340147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152349 + ... + 153859.

Almost surely, 2^231340144 is an apocalyptic number.

It is an amenable number.

231340144 is an abundant number, since it is smaller than the sum of its proper divisors (281627024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231340144 is a wasteful number, since it uses less digits than its factorization.

231340144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 231340144 is about 15209.8699534217. The cubic root of 231340144 is about 613.8802583148.

Adding to 231340144 its reverse (441043132), we get a palindrome (672383276).

The spelling of 231340144 in words is "two hundred thirty-one million, three hundred forty thousand, one hundred forty-four".