22415321 has 2 divisors, whose sum is σ = 22415322. Its totient is φ = 22415320.

The previous prime is 22415297. The next prime is 22415353. The reversal of 22415321 is 12351422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 2958400 = 4411^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 22415321 - 2¹⁰ = 22414297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22415293 and 22415302.

It is not a weakly prime, because it can be changed into another prime (22415021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11207660 + 11207661.

It is an arithmetic number, because the mean of its divisors is an integer number (11207661).

Almost surely, 2^22415321 is an apocalyptic number.

It is an amenable number.

22415321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22415321 is an equidigital number, since it uses as much as digits as its factorization.

22415321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 20.

The square root of 22415321 is about 4734.4821258507. The cubic root of 22415321 is about 281.9562034830.

Adding to 22415321 its reverse (12351422), we get a palindrome (34766743).

The spelling of 22415321 in words is "twenty-two million, four hundred fifteen thousand, three hundred twenty-one".