51049218 has 16 divisors (see below), whose sum is σ = 111380256. Its totient is φ = 15469440.

The previous prime is 51049211. The next prime is 51049237. The reversal of 51049218 is 81294015.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51049211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386671 + ... + 386802.

It is an arithmetic number, because the mean of its divisors is an integer number (6961266).

Almost surely, 2^51049218 is an apocalyptic number.

51049218 is an abundant number, since it is smaller than the sum of its proper divisors (60331038).

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

51049218 is a wasteful number, since it uses less digits than its factorization.

51049218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773489.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 51049218 is about 7144.8735468166. The cubic root of 51049218 is about 370.9622336673.

The spelling of 51049218 in words is "fifty-one million, forty-nine thousand, two hundred eighteen".