22203421 has 2 divisors, whose sum is σ = 22203422. Its totient is φ = 22203420.

The previous prime is 22203403. The next prime is 22203431. The reversal of 22203421 is 12430222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 19321 = 4710^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 22203421 - 2⁹ = 22202909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22203395 and 22203404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22203431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101710 + 11101711.

It is an arithmetic number, because the mean of its divisors is an integer number (11101711).

Almost surely, 2^22203421 is an apocalyptic number.

It is an amenable number.

22203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22203421 is an equidigital number, since it uses as much as digits as its factorization.

22203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22203421 is about 4712.0506151781. The cubic root of 22203421 is about 281.0649115713.

Adding to 22203421 its reverse (12430222), we get a palindrome (34633643).

The spelling of 22203421 in words is "twenty-two million, two hundred three thousand, four hundred twenty-one".