105447281 has 2 divisors, whose sum is σ = 105447282. Its totient is φ = 105447280.

The previous prime is 105447247. The next prime is 105447313. The reversal of 105447281 is 182744501.

It is a happy number.

It is an a-pointer prime, because the next prime (105447313) can be obtained adding 105447281 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 35808256 = 8345^2 + 5984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105447281 is a prime.

It is a super-2 number, since 2×105447281² = 22238258140585922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105440281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52723640 + 52723641.

It is an arithmetic number, because the mean of its divisors is an integer number (52723641).

Almost surely, 2^105447281 is an apocalyptic number.

It is an amenable number.

105447281 is a deficient number, since it is larger than the sum of its proper divisors (1).

105447281 is an equidigital number, since it uses as much as digits as its factorization.

105447281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 105447281 is about 10268.7526506387. The cubic root of 105447281 is about 472.4383331706.

The spelling of 105447281 in words is "one hundred five million, four hundred forty-seven thousand, two hundred eighty-one".