1231113544 has 16 divisors (see below), whose sum is σ = 2311282800. Its totient is φ = 614771472.

The previous prime is 1231113523. The next prime is 1231113551. The reversal of 1231113544 is 4453111321.

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, 91474 + ... + 104065.

It is an arithmetic number, because the mean of its divisors is an integer number (144455175).

Almost surely, 2^1231113544 is an apocalyptic number.

It is an amenable number.

1231113544 is a deficient number, since it is larger than the sum of its proper divisors (1080169256).

1231113544 is a wasteful number, since it uses less digits than its factorization.

1231113544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196332 (or 196328 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1231113544 is about 35087.2276476783. The cubic root of 1231113544 is about 1071.7645046862.

Adding to 1231113544 its reverse (4453111321), we get a palindrome (5684224865).

The spelling of 1231113544 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, five hundred forty-four".