231214440 has 64 divisors (see below), whose sum is σ = 709790400. Its totient is φ = 60221952.

The previous prime is 231214429. The next prime is 231214471. The reversal of 231214440 is 44412132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17245 + ... + 27564.

It is an arithmetic number, because the mean of its divisors is an integer number (11090475).

Almost surely, 2^231214440 is an apocalyptic number.

231214440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231214440 is an abundant number, since it is smaller than the sum of its proper divisors (478575960).

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

231214440 is a wasteful number, since it uses less digits than its factorization.

231214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44866 (or 44862 counting only the distinct ones).

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

The square root of 231214440 is about 15205.7370751963. The cubic root of 231214440 is about 613.7690495067.

Adding to 231214440 its reverse (44412132), we get a palindrome (275626572).

The spelling of 231214440 in words is "two hundred thirty-one million, two hundred fourteen thousand, four hundred forty".