473487221 has 2 divisors, whose sum is σ = 473487222. Its totient is φ = 473487220.

The previous prime is 473487199. The next prime is 473487257. The reversal of 473487221 is 122784374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385690321 + 87796900 = 19639^2 + 9370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-473487221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (473481221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236743610 + 236743611.

It is an arithmetic number, because the mean of its divisors is an integer number (236743611).

Almost surely, 2^473487221 is an apocalyptic number.

It is an amenable number.

473487221 is a deficient number, since it is larger than the sum of its proper divisors (1).

473487221 is an equidigital number, since it uses as much as digits as its factorization.

473487221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 38.

The square root of 473487221 is about 21759.7615106416. The cubic root of 473487221 is about 779.4161865207.

The spelling of 473487221 in words is "four hundred seventy-three million, four hundred eighty-seven thousand, two hundred twenty-one".