47311111 has 2 divisors, whose sum is σ = 47311112. Its totient is φ = 47311110.

The previous prime is 47311109. The next prime is 47311141. The reversal of 47311111 is 11111374.

It is a happy number.

47311111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47311111 - 2¹ = 47311109 is a prime.

Together with 47311109, it forms a pair of twin primes.

47311111 is a modest number, since divided by 11111 gives 473 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47311141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23655555 + 23655556.

It is an arithmetic number, because the mean of its divisors is an integer number (23655556).

Almost surely, 2^47311111 is an apocalyptic number.

47311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

47311111 is an equidigital number, since it uses as much as digits as its factorization.

47311111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 19.

The square root of 47311111 is about 6878.3072772304. The cubic root of 47311111 is about 361.6771308980.

Adding to 47311111 its reverse (11111374), we get a palindrome (58422485).

The spelling of 47311111 in words is "forty-seven million, three hundred eleven thousand, one hundred eleven".