556142181 has 8 divisors (see below), whose sum is σ = 847454784. Its totient is φ = 317795520.

The previous prime is 556142161. The next prime is 556142183. The reversal of 556142181 is 181241655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556142181 - 2¹⁵ = 556109413 is a prime.

It is a super-2 number, since 2×556142181² = 618588250974873522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556142183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13241460 + ... + 13241501.

It is an arithmetic number, because the mean of its divisors is an integer number (105931848).

Almost surely, 2^556142181 is an apocalyptic number.

It is an amenable number.

556142181 is a deficient number, since it is larger than the sum of its proper divisors (291312603).

556142181 is a wasteful number, since it uses less digits than its factorization.

556142181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26482971.

The product of its digits is 9600, while the sum is 33.

The square root of 556142181 is about 23582.6669611391. Note that the first 3 decimals coincide. The cubic root of 556142181 is about 822.3599382105.

The spelling of 556142181 in words is "five hundred fifty-six million, one hundred forty-two thousand, one hundred eighty-one".