47218138 has 16 divisors (see below), whose sum is σ = 77394240. Its totient is φ = 21427200.

The previous prime is 47218133. The next prime is 47218139. The reversal of 47218138 is 83181274.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (47218133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15523 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (4837140).

Almost surely, 2^47218138 is an apocalyptic number.

47218138 is a deficient number, since it is larger than the sum of its proper divisors (30176102).

47218138 is a wasteful number, since it uses less digits than its factorization.

47218138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573.

The product of its digits is 10752, while the sum is 34.

The square root of 47218138 is about 6871.5455321201. The cubic root of 47218138 is about 361.4400600281.

The spelling of 47218138 in words is "forty-seven million, two hundred eighteen thousand, one hundred thirty-eight".