44221381 has 2 divisors, whose sum is σ = 44221382. Its totient is φ = 44221380.

The previous prime is 44221357. The next prime is 44221391. The reversal of 44221381 is 18312244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 3389281 = 6390^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 44221381 - 2⁵ = 44221349 is a prime.

It is a super-2 number, since 2×44221381² = 3911061075094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44221351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22110690 + 22110691.

It is an arithmetic number, because the mean of its divisors is an integer number (22110691).

Almost surely, 2^44221381 is an apocalyptic number.

It is an amenable number.

44221381 is a deficient number, since it is larger than the sum of its proper divisors (1).

44221381 is an equidigital number, since it uses as much as digits as its factorization.

44221381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

The square root of 44221381 is about 6649.9158641294. The cubic root of 44221381 is about 353.6259281788.

The spelling of 44221381 in words is "forty-four million, two hundred twenty-one thousand, three hundred eighty-one".