47221423 has 4 divisors (see below), whose sum is σ = 47240368. Its totient is φ = 47202480.

The previous prime is 47221409. The next prime is 47221429. The reversal of 47221423 is 32412274.

It is a happy number.

47221423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32412274 = 2 ⋅16206137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47221423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47221429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5043 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (11810092).

Almost surely, 2^47221423 is an apocalyptic number.

47221423 is a deficient number, since it is larger than the sum of its proper divisors (18945).

47221423 is a wasteful number, since it uses less digits than its factorization.

47221423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18944.

The product of its digits is 2688, while the sum is 25.

The square root of 47221423 is about 6871.7845571584. The cubic root of 47221423 is about 361.4484417158.

Adding to 47221423 its reverse (32412274), we get a palindrome (79633697).

The spelling of 47221423 in words is "forty-seven million, two hundred twenty-one thousand, four hundred twenty-three".