47218225 has 12 divisors (see below), whose sum is σ = 59354956. Its totient is φ = 37255680.

The previous prime is 47218189. The next prime is 47218229. The reversal of 47218225 is 52281274.

It is a happy number.

47218225 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 6 ways, for example, as 651249 + 46566976 = 807^2 + 6824^2 .

It is not a de Polignac number, because 47218225 - 2¹¹ = 47216177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47218229) 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, 11112 + ... + 14761.

Almost surely, 2^47218225 is an apocalyptic number.

It is an amenable number.

47218225 is a deficient number, since it is larger than the sum of its proper divisors (12136731).

47218225 is a wasteful number, since it uses less digits than its factorization.

47218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25956 (or 25951 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 47218225 is about 6871.5518625708. The cubic root of 47218225 is about 361.4402820139.

Adding to 47218225 its reverse (52281274), we get a palindrome (99499499).

The spelling of 47218225 in words is "forty-seven million, two hundred eighteen thousand, two hundred twenty-five".