113441561 has 4 divisors (see below), whose sum is σ = 120114612. Its totient is φ = 106768512.

The previous prime is 113441557. The next prime is 113441563. The reversal of 113441561 is 165144311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69139225 + 44302336 = 8315^2 + 6656^2 .

It is a cyclic number.

It is not a de Polignac number, because 113441561 - 2² = 113441557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113441561.

It is not an unprimeable number, because it can be changed into a prime (113441563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336500 + ... + 3336533.

It is an arithmetic number, because the mean of its divisors is an integer number (30028653).

Almost surely, 2^113441561 is an apocalyptic number.

It is an amenable number.

113441561 is a deficient number, since it is larger than the sum of its proper divisors (6673051).

113441561 is an equidigital number, since it uses as much as digits as its factorization.

113441561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673050.

The product of its digits is 1440, while the sum is 26.

The square root of 113441561 is about 10650.8948450353. The cubic root of 113441561 is about 484.0877186025.

Adding to 113441561 its reverse (165144311), we get a palindrome (278585872).

The spelling of 113441561 in words is "one hundred thirteen million, four hundred forty-one thousand, five hundred sixty-one".