47224621 has 8 divisors (see below), whose sum is σ = 48755520. Its totient is φ = 45713472.

The previous prime is 47224607. The next prime is 47224627. The reversal of 47224621 is 12642274.

It is a happy number.

47224621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

47224621 is a nontrivial binomial coefficient, being equal to C(9719, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47224621 - 2⁹ = 47224109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47224621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47224627) 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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 9718.

It is an arithmetic number, because the mean of its divisors is an integer number (6094440).

Almost surely, 2^47224621 is an apocalyptic number.

47224621 is the 9718-th triangular number.

47224621 is the 3240-th centered nonagonal number.

It is an amenable number.

47224621 is a deficient number, since it is larger than the sum of its proper divisors (1530899).

47224621 is a wasteful number, since it uses less digits than its factorization.

47224621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9875.

The product of its digits is 5376, while the sum is 28.

The square root of 47224621 is about 6872.0172438666. The cubic root of 47224621 is about 361.4566010494.

Adding to 47224621 its reverse (12642274), we get a palindrome (59866895).

The spelling of 47224621 in words is "forty-seven million, two hundred twenty-four thousand, six hundred twenty-one".