71483281 has 2 divisors, whose sum is σ = 71483282. Its totient is φ = 71483280.

The previous prime is 71483267. The next prime is 71483299. The reversal of 71483281 is 18238417.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 1175056 = 8385^2 + 1084^2 .

It is an emirp because it is prime and its reverse (18238417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71483281 - 2¹¹ = 71481233 is a prime.

It is a super-2 number, since 2×71483281² = 10219718925049922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71483201) 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, 35741640 + 35741641.

It is an arithmetic number, because the mean of its divisors is an integer number (35741641).

Almost surely, 2^71483281 is an apocalyptic number.

It is an amenable number.

71483281 is a deficient number, since it is larger than the sum of its proper divisors (1).

71483281 is an equidigital number, since it uses as much as digits as its factorization.

71483281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 71483281 is about 8454.7785896498. The cubic root of 71483281 is about 415.0191717083.

The spelling of 71483281 in words is "seventy-one million, four hundred eighty-three thousand, two hundred eighty-one".