1143113331 has 32 divisors (see below), whose sum is σ = 1578818560. Its totient is φ = 735381504.

The previous prime is 1143113327. The next prime is 1143113353. The reversal of 1143113331 is 1333113411.

It is not a de Polignac number, because 1143113331 - 2² = 1143113327 is a prime.

It is a super-2 number, since 2×1143113331² = 2613416175019831122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143113298 and 1143113307.

It is not an unprimeable number, because it can be changed into a prime (1143112331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3064461 + ... + 3064833.

It is an arithmetic number, because the mean of its divisors is an integer number (49338080).

Almost surely, 2^1143113331 is an apocalyptic number.

1143113331 is a deficient number, since it is larger than the sum of its proper divisors (435705229).

1143113331 is a wasteful number, since it uses less digits than its factorization.

1143113331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its digits is 324, while the sum is 21.

The square root of 1143113331 is about 33809.9590505520. The cubic root of 1143113331 is about 1045.5940338739.

Adding to 1143113331 its reverse (1333113411), we get a palindrome (2476226742).

The spelling of 1143113331 in words is "one billion, one hundred forty-three million, one hundred thirteen thousand, three hundred thirty-one".