47222217 has 16 divisors (see below), whose sum is σ = 79953280. Its totient is φ = 26984016.

The previous prime is 47222159. The next prime is 47222221. The reversal of 47222217 is 71222274.

It is not a de Polignac number, because 47222217 - 2¹² = 47218121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47222297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124738 + ... + 125115.

It is an arithmetic number, because the mean of its divisors is an integer number (4997080).

Almost surely, 2^47222217 is an apocalyptic number.

It is an amenable number.

47222217 is a deficient number, since it is larger than the sum of its proper divisors (32731063).

47222217 is a wasteful number, since it uses less digits than its factorization.

47222217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249869 (or 249863 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 47222217 is about 6871.8423293903. The cubic root of 47222217 is about 361.4504675510.

The spelling of 47222217 in words is "forty-seven million, two hundred twenty-two thousand, two hundred seventeen".