47211911 has 2 divisors, whose sum is σ = 47211912. Its totient is φ = 47211910.

The previous prime is 47211863. The next prime is 47211943. The reversal of 47211911 is 11911274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47211911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47211961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23605955 + 23605956.

It is an arithmetic number, because the mean of its divisors is an integer number (23605956).

Almost surely, 2^47211911 is an apocalyptic number.

47211911 is a deficient number, since it is larger than the sum of its proper divisors (1).

47211911 is an equidigital number, since it uses as much as digits as its factorization.

47211911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 26.

The square root of 47211911 is about 6871.0924167850. The cubic root of 47211911 is about 361.4241707513.

The spelling of 47211911 in words is "forty-seven million, two hundred eleven thousand, nine hundred eleven".