47422318 has 4 divisors (see below), whose sum is σ = 71133480. Its totient is φ = 23711158.

The previous prime is 47422313. The next prime is 47422327. The reversal of 47422318 is 81322474.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 47422318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47422313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11855578 + ... + 11855581.

It is an arithmetic number, because the mean of its divisors is an integer number (17783370).

Almost surely, 2^47422318 is an apocalyptic number.

47422318 is a deficient number, since it is larger than the sum of its proper divisors (23711162).

47422318 is a wasteful number, since it uses less digits than its factorization.

47422318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23711161.

The product of its digits is 10752, while the sum is 31.

The square root of 47422318 is about 6886.3864254048. The cubic root of 47422318 is about 361.9602888787.

The spelling of 47422318 in words is "forty-seven million, four hundred twenty-two thousand, three hundred eighteen".