231441240 has 32 divisors (see below), whose sum is σ = 694324080. Its totient is φ = 61717632.

The previous prime is 231441233. The next prime is 231441241. The reversal of 231441240 is 42144132.

231441240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231441241) 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, 964219 + ... + 964458.

Almost surely, 2^231441240 is an apocalyptic number.

231441240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231441240 is an abundant number, since it is smaller than the sum of its proper divisors (462882840).

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

231441240 is a wasteful number, since it uses less digits than its factorization.

231441240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928691 (or 1928687 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 231441240 is about 15213.1929587447. The cubic root of 231441240 is about 613.9696674989.

Adding to 231441240 its reverse (42144132), we get a palindrome (273585372).

The spelling of 231441240 in words is "two hundred thirty-one million, four hundred forty-one thousand, two hundred forty".