44400222421 has 2 divisors, whose sum is σ = 44400222422. Its totient is φ = 44400222420.

The previous prime is 44400222397. The next prime is 44400222469. The reversal of 44400222421 is 12422200444.

44400222421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40988027025 + 3412195396 = 202455^2 + 58414^2 .

It is a cyclic number.

It is not a de Polignac number, because 44400222421 - 2⁹ = 44400221909 is a prime.

It is a super-2 number, since 2×44400222421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44400232421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22200111210 + 22200111211.

It is an arithmetic number, because the mean of its divisors is an integer number (22200111211).

Almost surely, 2^44400222421 is an apocalyptic number.

It is an amenable number.

44400222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

44400222421 is an equidigital number, since it uses as much as digits as its factorization.

44400222421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 44400222421 its reverse (12422200444), we get a palindrome (56822422865).

The spelling of 44400222421 in words is "forty-four billion, four hundred million, two hundred twenty-two thousand, four hundred twenty-one".