1113631731 has 12 divisors (see below), whose sum is σ = 1608957480. Its totient is φ = 742246560.

The previous prime is 1113631703. The next prime is 1113631787. The reversal of 1113631731 is 1371363111.

1113631731 is a `hidden beast` number, since 11 + 13 + 631 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 1113631731 - 2³⁰ = 39889907 is a prime.

It is a super-2 number, since 2×1113631731² = 2480351264580112722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1113631695 and 1113631704.

It is not an unprimeable number, because it can be changed into a prime (1113631031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34575 + ... + 58503.

It is an arithmetic number, because the mean of its divisors is an integer number (134079790).

Almost surely, 2^1113631731 is an apocalyptic number.

1113631731 is a deficient number, since it is larger than the sum of its proper divisors (495325749).

1113631731 is a wasteful number, since it uses less digits than its factorization.

1113631731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29106 (or 29103 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 1113631731 is about 33371.1212128091. The cubic root of 1113631731 is about 1036.5267923456.

Adding to 1113631731 its reverse (1371363111), we get a palindrome (2484994842).

The spelling of 1113631731 in words is "one billion, one hundred thirteen million, six hundred thirty-one thousand, seven hundred thirty-one".