22332421 has 2 divisors, whose sum is σ = 22332422. Its totient is φ = 22332420.

The previous prime is 22332419. The next prime is 22332433. The reversal of 22332421 is 12423322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 4901796 = 4175^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 22332421 - 2¹ = 22332419 is a prime.

Together with 22332419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22332461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11166210 + 11166211.

It is an arithmetic number, because the mean of its divisors is an integer number (11166211).

Almost surely, 2^22332421 is an apocalyptic number.

It is an amenable number.

22332421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22332421 is an equidigital number, since it uses as much as digits as its factorization.

22332421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 19.

The square root of 22332421 is about 4725.7190987193. The cubic root of 22332421 is about 281.6081819369.

Adding to 22332421 its reverse (12423322), we get a palindrome (34755743).

Subtracting from 22332421 its reverse (12423322), we obtain a palindrome (9909099).

The spelling of 22332421 in words is "twenty-two million, three hundred thirty-two thousand, four hundred twenty-one".