61189218 has 24 divisors (see below), whose sum is σ = 132720588. Its totient is φ = 20374272.

The previous prime is 61189211. The next prime is 61189237. The reversal of 61189218 is 81298116.

61189218 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 2 ways, for example, as 58476609 + 2712609 = 7647^2 + 1647^2 .

It is not an unprimeable number, because it can be changed into a prime (61189211) 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 11 ways as a sum of consecutive naturals, for example, 31030 + ... + 32942.

Almost surely, 2^61189218 is an apocalyptic number.

61189218 is an abundant number, since it is smaller than the sum of its proper divisors (71531370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61189218 is a wasteful number, since it uses less digits than its factorization.

61189218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698 (or 3695 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 61189218 is about 7822.3537378464. The cubic root of 61189218 is about 394.0563233832.

The spelling of 61189218 in words is "sixty-one million, one hundred eighty-nine thousand, two hundred eighteen".