47277281 has 2 divisors, whose sum is σ = 47277282. Its totient is φ = 47277280.

The previous prime is 47277271. The next prime is 47277283. The reversal of 47277281 is 18277274.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30426256 + 16851025 = 5516^2 + 4105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47277281 is a prime.

It is a super-2 number, since 2×47277281² = 4470282597505922, which contains 22 as substring.

Together with 47277283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47277283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23638640 + 23638641.

It is an arithmetic number, because the mean of its divisors is an integer number (23638641).

Almost surely, 2^47277281 is an apocalyptic number.

It is an amenable number.

47277281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47277281 is an equidigital number, since it uses as much as digits as its factorization.

47277281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43904, while the sum is 38.

The square root of 47277281 is about 6875.8476568348. The cubic root of 47277281 is about 361.5909041139.

The spelling of 47277281 in words is "forty-seven million, two hundred seventy-seven thousand, two hundred eighty-one".