44442421 has 2 divisors, whose sum is σ = 44442422. Its totient is φ = 44442420.

The previous prime is 44442383. The next prime is 44442427. The reversal of 44442421 is 12424444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 20295025 = 4914^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 44442421 - 2¹⁵ = 44409653 is a prime.

It is a super-3 number, since 3×44442421³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44442427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22221210 + 22221211.

It is an arithmetic number, because the mean of its divisors is an integer number (22221211).

Almost surely, 2^44442421 is an apocalyptic number.

It is an amenable number.

44442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

44442421 is an equidigital number, since it uses as much as digits as its factorization.

44442421 is an evil number, because the sum of its binary digits is even.

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

The square root of 44442421 is about 6666.5149066060. The cubic root of 44442421 is about 354.2141474028.

Adding to 44442421 its reverse (12424444), we get a palindrome (56866865).

The spelling of 44442421 in words is "forty-four million, four hundred forty-two thousand, four hundred twenty-one".