1231143230 has 32 divisors (see below), whose sum is σ = 2372807520. Its totient is φ = 458275840.

The previous prime is 1231143223. The next prime is 1231143259. The reversal of 1231143230 is 323411321.

It is a congruent number.

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, 25556 + ... + 55815.

It is an arithmetic number, because the mean of its divisors is an integer number (74150235).

Almost surely, 2^1231143230 is an apocalyptic number.

1231143230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231143230 is a deficient number, since it is larger than the sum of its proper divisors (1141664290).

1231143230 is a wasteful number, since it uses less digits than its factorization.

1231143230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81484.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1231143230 is about 35087.6506765557. The cubic root of 1231143230 is about 1071.7731191490.

Adding to 1231143230 its reverse (323411321), we get a palindrome (1554554551).

The spelling of 1231143230 in words is "one billion, two hundred thirty-one million, one hundred forty-three thousand, two hundred thirty".