61118281 has 16 divisors (see below), whose sum is σ = 74373120. Its totient is φ = 49029120.

The previous prime is 61118263. The next prime is 61118287. The reversal of 61118281 is 18281116.

61118281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61118281 - 2⁹ = 61117769 is a prime.

It is a super-2 number, since 2×61118281² = 7470888544789922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61118287) 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 15 ways as a sum of consecutive naturals, for example, 21385 + ... + 24073.

It is an arithmetic number, because the mean of its divisors is an integer number (4648320).

Almost surely, 2^61118281 is an apocalyptic number.

It is an amenable number.

61118281 is a deficient number, since it is larger than the sum of its proper divisors (13254839).

61118281 is a wasteful number, since it uses less digits than its factorization.

61118281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904.

The product of its digits is 768, while the sum is 28.

The square root of 61118281 is about 7817.8181738897. The cubic root of 61118281 is about 393.9039872725.

Adding to 61118281 its reverse (18281116), we get a palindrome (79399397).

The spelling of 61118281 in words is "sixty-one million, one hundred eighteen thousand, two hundred eighty-one".