6018181 has 4 divisors (see below), whose sum is σ = 6481132. Its totient is φ = 5555232.

The previous prime is 6018143. The next prime is 6018191. The reversal of 6018181 is 1818106.

It is a happy number.

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 3094081 + 2924100 = 1759^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 6018181 - 2¹⁷ = 5887109 is a prime.

It is a super-2 number, since 2×6018181² = 72437005097522, which contains 22 as substring.

It is a Duffinian number.

6018181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6018191) 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, 231456 + ... + 231481.

It is an arithmetic number, because the mean of its divisors is an integer number (1620283).

Almost surely, 2^6018181 is an apocalyptic number.

It is an amenable number.

6018181 is a deficient number, since it is larger than the sum of its proper divisors (462951).

6018181 is a wasteful number, since it uses less digits than its factorization.

6018181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462950.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 6018181 is about 2453.1981167448. The cubic root of 6018181 is about 181.8954134848.

The spelling of 6018181 in words is "six million, eighteen thousand, one hundred eighty-one".