47241781 has 2 divisors, whose sum is σ = 47241782. Its totient is φ = 47241780.

The previous prime is 47241773. The next prime is 47241787. The reversal of 47241781 is 18714274.

47241781 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 can be written as a sum of positive squares in only one way, i.e., 27394756 + 19847025 = 5234^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 47241781 - 2³ = 47241773 is a prime.

It is a super-2 number, since 2×47241781² = 4463571744103922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47241787) 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, 23620890 + 23620891.

It is an arithmetic number, because the mean of its divisors is an integer number (23620891).

Almost surely, 2^47241781 is an apocalyptic number.

It is an amenable number.

47241781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47241781 is an equidigital number, since it uses as much as digits as its factorization.

47241781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 34.

The square root of 47241781 is about 6873.2656721532. The cubic root of 47241781 is about 361.5003765491.

The spelling of 47241781 in words is "forty-seven million, two hundred forty-one thousand, seven hundred eighty-one".