47812217 has 2 divisors, whose sum is σ = 47812218. Its totient is φ = 47812216.

The previous prime is 47812169. The next prime is 47812229. The reversal of 47812217 is 71221874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29800681 + 18011536 = 5459^2 + 4244^2 .

It is a cyclic number.

It is not a de Polignac number, because 47812217 - 2¹⁰ = 47811193 is a prime.

It is not a weakly prime, because it can be changed into another prime (47812277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23906108 + 23906109.

It is an arithmetic number, because the mean of its divisors is an integer number (23906109).

Almost surely, 2^47812217 is an apocalyptic number.

It is an amenable number.

47812217 is a deficient number, since it is larger than the sum of its proper divisors (1).

47812217 is an equidigital number, since it uses as much as digits as its factorization.

47812217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 47812217 is about 6914.6378791662. The cubic root of 47812217 is about 362.9495764844.

The spelling of 47812217 in words is "forty-seven million, eight hundred twelve thousand, two hundred seventeen".