49181218 has 4 divisors (see below), whose sum is σ = 73771830. Its totient is φ = 24590608.

The previous prime is 49181201. The next prime is 49181227. The reversal of 49181218 is 81218194.

49181218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46335249 + 2845969 = 6807^2 + 1687^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12295303 + ... + 12295306.

Almost surely, 2^49181218 is an apocalyptic number.

49181218 is a deficient number, since it is larger than the sum of its proper divisors (24590612).

49181218 is a wasteful number, since it uses less digits than its factorization.

49181218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24590611.

The product of its digits is 4608, while the sum is 34.

The square root of 49181218 is about 7012.9321970200. The cubic root of 49181218 is about 366.3811262708.

The spelling of 49181218 in words is "forty-nine million, one hundred eighty-one thousand, two hundred eighteen".