47168221 has 2 divisors, whose sum is σ = 47168222. Its totient is φ = 47168220.

The previous prime is 47168207. The next prime is 47168243. The reversal of 47168221 is 12286174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 19236996 = 5285^2 + 4386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47168221 is a prime.

It is a Chen prime.

It is equal to p_2841169 and since 47168221 and 2841169 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47168321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23584110 + 23584111.

It is an arithmetic number, because the mean of its divisors is an integer number (23584111).

Almost surely, 2^47168221 is an apocalyptic number.

It is an amenable number.

47168221 is a deficient number, since it is larger than the sum of its proper divisors (1).

47168221 is an equidigital number, since it uses as much as digits as its factorization.

47168221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 47168221 is about 6867.9124193600. The cubic root of 47168221 is about 361.3126487851.

The spelling of 47168221 in words is "forty-seven million, one hundred sixty-eight thousand, two hundred twenty-one".