1113243131 has 16 divisors (see below), whose sum is σ = 1494705408. Its totient is φ = 800733600.

The previous prime is 1113243127. The next prime is 1113243137. The reversal of 1113243131 is 1313423111.

It is a cyclic number.

It is not a de Polignac number, because 1113243131 - 2² = 1113243127 is a prime.

It is a super-2 number, since 2×1113243131² = 2478620537437366322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1113243137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555065 + ... + 557066.

It is an arithmetic number, because the mean of its divisors is an integer number (93419088).

Almost surely, 2^1113243131 is an apocalyptic number.

1113243131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1113243131 is a deficient number, since it is larger than the sum of its proper divisors (381462277).

1113243131 is a wasteful number, since it uses less digits than its factorization.

1113243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112162.

The product of its digits is 216, while the sum is 20.

The square root of 1113243131 is about 33365.2983052752. The cubic root of 1113243131 is about 1036.4062135340.

Adding to 1113243131 its reverse (1313423111), we get a palindrome (2426666242).

The spelling of 1113243131 in words is "one billion, one hundred thirteen million, two hundred forty-three thousand, one hundred thirty-one".