47193221 has 2 divisors, whose sum is σ = 47193222. Its totient is φ = 47193220.

The previous prime is 47193197. The next prime is 47193239. The reversal of 47193221 is 12239174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32092225 + 15100996 = 5665^2 + 3886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47193221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47193281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23596610 + 23596611.

It is an arithmetic number, because the mean of its divisors is an integer number (23596611).

Almost surely, 2^47193221 is an apocalyptic number.

It is an amenable number.

47193221 is a deficient number, since it is larger than the sum of its proper divisors (1).

47193221 is an equidigital number, since it uses as much as digits as its factorization.

47193221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 47193221 is about 6869.7322364121. The cubic root of 47193221 is about 361.3764715642.

The spelling of 47193221 in words is "forty-seven million, one hundred ninety-three thousand, two hundred twenty-one".