44181281 has 2 divisors, whose sum is σ = 44181282. Its totient is φ = 44181280.

The previous prime is 44181257. The next prime is 44181287. The reversal of 44181281 is 18218144.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44102881 + 78400 = 6641^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 44181281 - 2⁶ = 44181217 is a prime.

It is a super-2 number, since 2×44181281² = 3903971181601922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44181287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22090640 + 22090641.

It is an arithmetic number, because the mean of its divisors is an integer number (22090641).

Almost surely, 2^44181281 is an apocalyptic number.

It is an amenable number.

44181281 is a deficient number, since it is larger than the sum of its proper divisors (1).

44181281 is an equidigital number, since it uses as much as digits as its factorization.

44181281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 29.

The square root of 44181281 is about 6646.9001045600. The cubic root of 44181281 is about 353.5190063850.

The spelling of 44181281 in words is "forty-four million, one hundred eighty-one thousand, two hundred eighty-one".