231214240 has 48 divisors (see below), whose sum is σ = 547327368. Its totient is φ = 92302336.

The previous prime is 231214237. The next prime is 231214241. The reversal of 231214240 is 42412132.

It can be written as a sum of positive squares in 4 ways, for example, as 216560656 + 14653584 = 14716^2 + 3828^2 .

It is not an unprimeable number, because it can be changed into a prime (231214241) 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, 103374 + ... + 105586.

Almost surely, 2^231214240 is an apocalyptic number.

231214240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231214240 is an abundant number, since it is smaller than the sum of its proper divisors (316113128).

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

231214240 is a wasteful number, since it uses less digits than its factorization.

231214240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 231214240 is about 15205.7304987297. The cubic root of 231214240 is about 613.7688725370.

Adding to 231214240 its reverse (42412132), we get a palindrome (273626372).

The spelling of 231214240 in words is "two hundred thirty-one million, two hundred fourteen thousand, two hundred forty".