47422981 has 2 divisors, whose sum is σ = 47422982. Its totient is φ = 47422980.

The previous prime is 47422967. The next prime is 47422997. The reversal of 47422981 is 18922474.

47422981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33292900 + 14130081 = 5770^2 + 3759^2 .

It is a cyclic number.

It is not a de Polignac number, because 47422981 - 2⁷ = 47422853 is a prime.

It is a super-2 number, since 2×47422981² = 4497878253852722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47422981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47422381) 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, 23711490 + 23711491.

It is an arithmetic number, because the mean of its divisors is an integer number (23711491).

Almost surely, 2^47422981 is an apocalyptic number.

It is an amenable number.

47422981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47422981 is an equidigital number, since it uses as much as digits as its factorization.

47422981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 47422981 is about 6886.4345636911. The cubic root of 47422981 is about 361.9619756974.

The spelling of 47422981 in words is "forty-seven million, four hundred twenty-two thousand, nine hundred eighty-one".