47681551 has 2 divisors, whose sum is σ = 47681552. Its totient is φ = 47681550.

The previous prime is 47681533. The next prime is 47681561. The reversal of 47681551 is 15518674.

47681551 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 47681551 - 2⁵ = 47681519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47681551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47681521) 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, 23840775 + 23840776.

It is an arithmetic number, because the mean of its divisors is an integer number (23840776).

Almost surely, 2^47681551 is an apocalyptic number.

47681551 is a deficient number, since it is larger than the sum of its proper divisors (1).

47681551 is an equidigital number, since it uses as much as digits as its factorization.

47681551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 37.

The square root of 47681551 is about 6905.1829085115. The cubic root of 47681551 is about 362.6186398828.

The spelling of 47681551 in words is "forty-seven million, six hundred eighty-one thousand, five hundred fifty-one".