111413581 has 4 divisors (see below), whose sum is σ = 111469500. Its totient is φ = 111357664.

The previous prime is 111413569. The next prime is 111413609. The reversal of 111413581 is 185314111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 185314111 = 5407 ⋅34273.

It can be written as a sum of positive squares in 2 ways, for example, as 75533481 + 35880100 = 8691^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 111413581 - 2¹⁹ = 110889293 is a prime.

It is a super-2 number, since 2×111413581² = 24825972062487122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111413501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24856 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (27867375).

Almost surely, 2^111413581 is an apocalyptic number.

It is an amenable number.

111413581 is a deficient number, since it is larger than the sum of its proper divisors (55919).

111413581 is an equidigital number, since it uses as much as digits as its factorization.

111413581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55918.

The product of its digits is 480, while the sum is 25.

The square root of 111413581 is about 10555.2631895183. The cubic root of 111413581 is about 481.1856985883.

Adding to 111413581 its reverse (185314111), we get a palindrome (296727692).

The spelling of 111413581 in words is "one hundred eleven million, four hundred thirteen thousand, five hundred eighty-one".