47245621 has 2 divisors, whose sum is σ = 47245622. Its totient is φ = 47245620.

The previous prime is 47245613. The next prime is 47245637. The reversal of 47245621 is 12654274.

47245621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27973521 + 19272100 = 5289^2 + 4390^2 .

It is a cyclic number.

It is not a de Polignac number, because 47245621 - 2³ = 47245613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47245661) 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, 23622810 + 23622811.

It is an arithmetic number, because the mean of its divisors is an integer number (23622811).

Almost surely, 2^47245621 is an apocalyptic number.

It is an amenable number.

47245621 is a deficient number, since it is larger than the sum of its proper divisors (1).

47245621 is an equidigital number, since it uses as much as digits as its factorization.

47245621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 47245621 is about 6873.5450096730. The cubic root of 47245621 is about 361.5101710136.

Adding to 47245621 its reverse (12654274), we get a palindrome (59899895).

The spelling of 47245621 in words is "forty-seven million, two hundred forty-five thousand, six hundred twenty-one".