231141440 has 28 divisors (see below), whose sum is σ = 550406316. Its totient is φ = 92456448.

The previous prime is 231141437. The next prime is 231141451. The reversal of 231141440 is 44141132.

231141440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59845696 + 171295744 = 7736^2 + 13088^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360839 + ... + 361478.

Almost surely, 2^231141440 is an apocalyptic number.

231141440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231141440 is an abundant number, since it is smaller than the sum of its proper divisors (319264876).

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

231141440 is an equidigital number, since it uses as much as digits as its factorization.

231141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722334 (or 722324 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 231141440 is about 15203.3364759187. The cubic root of 231141440 is about 613.7044487883.

Adding to 231141440 its reverse (44141132), we get a palindrome (275282572).

The spelling of 231141440 in words is "two hundred thirty-one million, one hundred forty-one thousand, four hundred forty".