47218164 has 72 divisors (see below), whose sum is σ = 129352608. Its totient is φ = 13366080.

The previous prime is 47218159. The next prime is 47218169. The reversal of 47218164 is 46181274.

It is an interprime number because it is at equal distance from previous prime (47218159) and next prime (47218169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47218169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76722 + ... + 77334.

It is an arithmetic number, because the mean of its divisors is an integer number (1796564).

Almost surely, 2^47218164 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 47218164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64676304).

47218164 is an abundant number, since it is smaller than the sum of its proper divisors (82134444).

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

47218164 is a wasteful number, since it uses less digits than its factorization.

47218164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 756 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 47218164 is about 6871.5474239796. The cubic root of 47218164 is about 361.4401263687.

The spelling of 47218164 in words is "forty-seven million, two hundred eighteen thousand, one hundred sixty-four".