47725621 has 8 divisors (see below), whose sum is σ = 49875264. Its totient is φ = 45582240.

The previous prime is 47725591. The next prime is 47725637. The reversal of 47725621 is 12652774.

47725621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 47725621 - 2⁵ = 47725589 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 (47725651) 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, 21265 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (6234408).

Almost surely, 2^47725621 is an apocalyptic number.

It is an amenable number.

47725621 is a deficient number, since it is larger than the sum of its proper divisors (2149643).

47725621 is a wasteful number, since it uses less digits than its factorization.

47725621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131.

The product of its digits is 23520, while the sum is 34.

The square root of 47725621 is about 6908.3732527998. The cubic root of 47725621 is about 362.7303230689.

The spelling of 47725621 in words is "forty-seven million, seven hundred twenty-five thousand, six hundred twenty-one".