47121511 has 2 divisors, whose sum is σ = 47121512. Its totient is φ = 47121510.

The previous prime is 47121499. The next prime is 47121517. The reversal of 47121511 is 11512174.

47121511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47121511 - 2⁷ = 47121383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47121517) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23560755 + 23560756.

It is an arithmetic number, because the mean of its divisors is an integer number (23560756).

Almost surely, 2^47121511 is an apocalyptic number.

47121511 is a deficient number, since it is larger than the sum of its proper divisors (1).

47121511 is an equidigital number, since it uses as much as digits as its factorization.

47121511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 22.

The square root of 47121511 is about 6864.5109803977. The cubic root of 47121511 is about 361.1933418484.

Adding to 47121511 its reverse (11512174), we get a palindrome (58633685).

The spelling of 47121511 in words is "forty-seven million, one hundred twenty-one thousand, five hundred eleven".