113000581 has 12 divisors (see below), whose sum is σ = 126283212. Its totient is φ = 100750464.

The previous prime is 113000561. The next prime is 113000623. The reversal of 113000581 is 185000311.

113000581 = T₈₆₇₈ + T₈₆₇₉ + T₈₆₈₀.

It can be written as a sum of positive squares in 2 ways, for example, as 59213025 + 53787556 = 7695^2 + 7334^2 .

It is not a de Polignac number, because 113000581 - 2¹¹ = 112998533 is a prime.

It is a super-2 number, since 2×113000581² = 25538262612675122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113000521) 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 11 ways as a sum of consecutive naturals, for example, 3070 + ... + 15343.

It is an arithmetic number, because the mean of its divisors is an integer number (10523601).

Almost surely, 2^113000581 is an apocalyptic number.

113000581 is the 8680-th centered triangular number.

It is an amenable number.

113000581 is a deficient number, since it is larger than the sum of its proper divisors (13282631).

113000581 is a wasteful number, since it uses less digits than its factorization.

113000581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18468 (or 18449 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 113000581 is about 10630.1731406407. The cubic root of 113000581 is about 483.4596412925.

Adding to 113000581 its reverse (185000311), we get a palindrome (298000892).

The spelling of 113000581 in words is "one hundred thirteen million, five hundred eighty-one", and thus it is an aban number.