113556181 has 2 divisors, whose sum is σ = 113556182. Its totient is φ = 113556180.

The previous prime is 113556173. The next prime is 113556203. The reversal of 113556181 is 181655311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103734225 + 9821956 = 10185^2 + 3134^2 .

It is a cyclic number.

It is not a de Polignac number, because 113556181 - 2³ = 113556173 is a prime.

It is a super-2 number, since 2×113556181² = 25790012486609522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113556151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56778090 + 56778091.

It is an arithmetic number, because the mean of its divisors is an integer number (56778091).

Almost surely, 2^113556181 is an apocalyptic number.

It is an amenable number.

113556181 is a deficient number, since it is larger than the sum of its proper divisors (1).

113556181 is an equidigital number, since it uses as much as digits as its factorization.

113556181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 31.

The square root of 113556181 is about 10656.2742551044. The cubic root of 113556181 is about 484.2507025412.

The spelling of 113556181 in words is "one hundred thirteen million, five hundred fifty-six thousand, one hundred eighty-one".