1231440230 has 16 divisors (see below), whose sum is σ = 2217805920. Its totient is φ = 492306432.

The previous prime is 1231440227. The next prime is 1231440247. The reversal of 1231440230 is 320441321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13979 + ... + 51558.

It is an arithmetic number, because the mean of its divisors is an integer number (138612870).

Almost surely, 2^1231440230 is an apocalyptic number.

1231440230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231440230 is a deficient number, since it is larger than the sum of its proper divisors (986365690).

1231440230 is a wasteful number, since it uses less digits than its factorization.

1231440230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67423.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1231440230 is about 35091.8826796169. The cubic root of 1231440230 is about 1071.8592967805.

Adding to 1231440230 its reverse (320441321), we get a palindrome (1551881551).

The spelling of 1231440230 in words is "one billion, two hundred thirty-one million, four hundred forty thousand, two hundred thirty".