65042181 has 6 divisors (see below), whose sum is σ = 93949830. Its totient is φ = 43361448.

The previous prime is 65042167. The next prime is 65042207. The reversal of 65042181 is 18124056.

65042181 is a `hidden beast` number, since 650 + 4 + 2 + 1 + 8 + 1 = 666.

65042181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 497025 = 8034^2 + 705^2 .

It is not a de Polignac number, because 65042181 - 2¹⁴ = 65025797 is a prime.

It is a super-2 number, since 2×65042181² = 8460970618473522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65042141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3613446 + ... + 3613463.

It is an arithmetic number, because the mean of its divisors is an integer number (15658305).

Almost surely, 2^65042181 is an apocalyptic number.

It is an amenable number.

65042181 is a deficient number, since it is larger than the sum of its proper divisors (28907649).

65042181 is a wasteful number, since it uses less digits than its factorization.

65042181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226915 (or 7226912 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 65042181 is about 8064.8732786077. The cubic root of 65042181 is about 402.1595305051.

The spelling of 65042181 in words is "sixty-five million, forty-two thousand, one hundred eighty-one".