43980281 has 2 divisors, whose sum is σ = 43980282. Its totient is φ = 43980280.

The previous prime is 43980257. The next prime is 43980323. The reversal of 43980281 is 18208934.

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., 26832400 + 17147881 = 5180^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 43980281 - 2¹⁴ = 43963897 is a prime.

It is a super-2 number, since 2×43980281² = 3868530233677922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43920281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21990140 + 21990141.

It is an arithmetic number, because the mean of its divisors is an integer number (21990141).

Almost surely, 2^43980281 is an apocalyptic number.

It is an amenable number.

43980281 is a deficient number, since it is larger than the sum of its proper divisors (1).

43980281 is an equidigital number, since it uses as much as digits as its factorization.

43980281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 43980281 is about 6631.7630385894. The cubic root of 43980281 is about 352.9820870622.

The spelling of 43980281 in words is "forty-three million, nine hundred eighty thousand, two hundred eighty-one".