44215121 has 2 divisors, whose sum is σ = 44215122. Its totient is φ = 44215120.

The previous prime is 44215117. The next prime is 44215123. The reversal of 44215121 is 12151244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 5290000 = 6239^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 44215121 - 2² = 44215117 is a prime.

Together with 44215123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 44215093 and 44215102.

It is not a weakly prime, because it can be changed into another prime (44215123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22107560 + 22107561.

It is an arithmetic number, because the mean of its divisors is an integer number (22107561).

Almost surely, 2^44215121 is an apocalyptic number.

It is an amenable number.

44215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

44215121 is an equidigital number, since it uses as much as digits as its factorization.

44215121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 44215121 is about 6649.4451648239. The cubic root of 44215121 is about 353.6092409058.

Adding to 44215121 its reverse (12151244), we get a palindrome (56366365).

The spelling of 44215121 in words is "forty-four million, two hundred fifteen thousand, one hundred twenty-one".