47615621 has 2 divisors, whose sum is σ = 47615622. Its totient is φ = 47615620.

The previous prime is 47615573. The next prime is 47615639. The reversal of 47615621 is 12651674.

47615621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 4778596 = 6545^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 47615621 - 2¹⁸ = 47353477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47615641) 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 as a sum of consecutive naturals, namely, 23807810 + 23807811.

It is an arithmetic number, because the mean of its divisors is an integer number (23807811).

Almost surely, 2^47615621 is an apocalyptic number.

It is an amenable number.

47615621 is a deficient number, since it is larger than the sum of its proper divisors (1).

47615621 is an equidigital number, since it uses as much as digits as its factorization.

47615621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 47615621 is about 6900.4073068189. The cubic root of 47615621 is about 362.4514300364.

The spelling of 47615621 in words is "forty-seven million, six hundred fifteen thousand, six hundred twenty-one".