113135561 has 24 divisors (see below), whose sum is σ = 152028576. Its totient is φ = 82965120.

The previous prime is 113135531. The next prime is 113135567. The reversal of 113135561 is 165531311.

It is not a de Polignac number, because 113135561 - 2⁶ = 113135497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113135561.

It is not an unprimeable number, because it can be changed into a prime (113135567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2990 + ... + 15336.

It is an arithmetic number, because the mean of its divisors is an integer number (6334524).

Almost surely, 2^113135561 is an apocalyptic number.

113135561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113135561 is a deficient number, since it is larger than the sum of its proper divisors (38893015).

113135561 is a wasteful number, since it uses less digits than its factorization.

113135561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12389 (or 12382 counting only the distinct ones).

The product of its digits is 1350, while the sum is 26.

The square root of 113135561 is about 10636.5201546370. The cubic root of 113135561 is about 483.6520633597.

Adding to 113135561 its reverse (165531311), we get a palindrome (278666872).

The spelling of 113135561 in words is "one hundred thirteen million, one hundred thirty-five thousand, five hundred sixty-one".