244421381 has 2 divisors, whose sum is σ = 244421382. Its totient is φ = 244421380.

The previous prime is 244421341. The next prime is 244421389. The reversal of 244421381 is 183124442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162970756 + 81450625 = 12766^2 + 9025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244421381 is a prime.

It is a super-2 number, since 2×244421381² = 119483622979894322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244421389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122210690 + 122210691.

It is an arithmetic number, because the mean of its divisors is an integer number (122210691).

Almost surely, 2^244421381 is an apocalyptic number.

It is an amenable number.

244421381 is a deficient number, since it is larger than the sum of its proper divisors (1).

244421381 is an equidigital number, since it uses as much as digits as its factorization.

244421381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 29.

The square root of 244421381 is about 15633.9816105815. The cubic root of 244421381 is about 625.2394866754.

The spelling of 244421381 in words is "two hundred forty-four million, four hundred twenty-one thousand, three hundred eighty-one".