47218512 has 80 divisors (see below), whose sum is σ = 136723392. Its totient is φ = 13916160.

The previous prime is 47218489. The next prime is 47218543. The reversal of 47218512 is 21581274.

47218512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 47218512.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 18328 + ... + 20744.

Almost surely, 2^47218512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47218512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68361696).

47218512 is an abundant number, since it is smaller than the sum of its proper divisors (89504880).

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

47218512 is a wasteful number, since it uses less digits than its factorization.

47218512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476 (or 2470 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 47218512 is about 6871.5727457402. The cubic root of 47218512 is about 361.4410143099.

Adding to 47218512 its reverse (21581274), we get a palindrome (68799786).

The spelling of 47218512 in words is "forty-seven million, two hundred eighteen thousand, five hundred twelve".