47222281 has 2 divisors, whose sum is σ = 47222282. Its totient is φ = 47222280.

The previous prime is 47222251. The next prime is 47222291. The reversal of 47222281 is 18222274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 176400 = 6859^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 47222281 - 2¹⁹ = 46697993 is a prime.

It is a super-2 number, since 2×47222281² = 4459887645685922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47222221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23611140 + 23611141.

It is an arithmetic number, because the mean of its divisors is an integer number (23611141).

Almost surely, 2^47222281 is an apocalyptic number.

It is an amenable number.

47222281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47222281 is an equidigital number, since it uses as much as digits as its factorization.

47222281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 28.

The square root of 47222281 is about 6871.8469860730. The cubic root of 47222281 is about 361.4506308415.

The spelling of 47222281 in words is "forty-seven million, two hundred twenty-two thousand, two hundred eighty-one".