47223191 has 2 divisors, whose sum is σ = 47223192. Its totient is φ = 47223190.

The previous prime is 47223167. The next prime is 47223193. The reversal of 47223191 is 19132274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47223191 is a prime.

It is a Sophie Germain prime.

Together with 47223193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47223193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23611595 + 23611596.

It is an arithmetic number, because the mean of its divisors is an integer number (23611596).

Almost surely, 2^47223191 is an apocalyptic number.

47223191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47223191 is an equidigital number, since it uses as much as digits as its factorization.

47223191 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 47223191 is about 6871.9131979384. The cubic root of 47223191 is about 361.4529526124.

The spelling of 47223191 in words is "forty-seven million, two hundred twenty-three thousand, one hundred ninety-one".