22227421 has 2 divisors, whose sum is σ = 22227422. Its totient is φ = 22227420.

The previous prime is 22227409. The next prime is 22227433. The reversal of 22227421 is 12472222.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (22227409) and next prime (22227433).

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 5625 = 4714^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 22227421 - 2⁹ = 22226909 is a prime.

It is a super-2 number, since 2×22227421² = 988116488622482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22227392 and 22227401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22227221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11113710 + 11113711.

It is an arithmetic number, because the mean of its divisors is an integer number (11113711).

Almost surely, 2^22227421 is an apocalyptic number.

It is an amenable number.

22227421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22227421 is an equidigital number, since it uses as much as digits as its factorization.

22227421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 22.

The square root of 22227421 is about 4714.5965893171. The cubic root of 22227421 is about 281.1661441528.

Adding to 22227421 its reverse (12472222), we get a palindrome (34699643).

The spelling of 22227421 in words is "twenty-two million, two hundred twenty-seven thousand, four hundred twenty-one".