1231143330 has 16 divisors (see below), whose sum is σ = 2954744064. Its totient is φ = 328304880.

The previous prime is 1231143313. The next prime is 1231143443. The reversal of 1231143330 is 333411321.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231143297 and 1231143306.

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, 20519026 + ... + 20519085.

It is an arithmetic number, because the mean of its divisors is an integer number (184671504).

Almost surely, 2^1231143330 is an apocalyptic number.

1231143330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231143330 is an abundant number, since it is smaller than the sum of its proper divisors (1723600734).

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

1231143330 is a wasteful number, since it uses less digits than its factorization.

1231143330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41038121.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1231143330 is about 35087.6521015585. The cubic root of 1231143330 is about 1071.7731481674.

Adding to 1231143330 its reverse (333411321), we get a palindrome (1564554651).

The spelling of 1231143330 in words is "one billion, two hundred thirty-one million, one hundred forty-three thousand, three hundred thirty".