1231143332 has 12 divisors (see below), whose sum is σ = 2281236300. Its totient is φ = 579361536.

The previous prime is 1231143313. The next prime is 1231143443. The reversal of 1231143332 is 2333411321.

It can be written as a sum of positive squares in 2 ways, for example, as 1102638436 + 128504896 = 33206^2 + 11336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231143298 and 1231143307.

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, 9052457 + ... + 9052592.

It is an arithmetic number, because the mean of its divisors is an integer number (190103025).

Almost surely, 2^1231143332 is an apocalyptic number.

It is an amenable number.

1231143332 is a deficient number, since it is larger than the sum of its proper divisors (1050092968).

1231143332 is a wasteful number, since it uses less digits than its factorization.

1231143332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105070 (or 18105068 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 1231143332 is about 35087.6521300585. The cubic root of 1231143332 is about 1071.7731487477.

Adding to 1231143332 its reverse (2333411321), we get a palindrome (3564554653).

The spelling of 1231143332 in words is "one billion, two hundred thirty-one million, one hundred forty-three thousand, three hundred thirty-two".