22444381 has 2 divisors, whose sum is σ = 22444382. Its totient is φ = 22444380.

The previous prime is 22444379. The next prime is 22444391. The reversal of 22444381 is 18344422.

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., 13623481 + 8820900 = 3691^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 22444381 - 2¹ = 22444379 is a prime.

It is a super-2 number, since 2×22444381² = 1007500476946322, which contains 22 as substring.

Together with 22444379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22444351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11222190 + 11222191.

It is an arithmetic number, because the mean of its divisors is an integer number (11222191).

Almost surely, 2^22444381 is an apocalyptic number.

It is an amenable number.

22444381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22444381 is an equidigital number, since it uses as much as digits as its factorization.

22444381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 28.

The square root of 22444381 is about 4737.5501052759. The cubic root of 22444381 is about 282.0779968013.

The spelling of 22444381 in words is "twenty-two million, four hundred forty-four thousand, three hundred eighty-one".