22324021 has 2 divisors, whose sum is σ = 22324022. Its totient is φ = 22324020.

The previous prime is 22323979. The next prime is 22324037. The reversal of 22324021 is 12042322.

It is an a-pointer prime, because the next prime (22324037) can be obtained adding 22324021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17098225 + 5225796 = 4135^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 22324021 - 2⁷ = 22323893 is a prime.

It is a super-3 number, since 3×22324021³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22323986 and 22324004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22321021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11162010 + 11162011.

It is an arithmetic number, because the mean of its divisors is an integer number (11162011).

Almost surely, 2^22324021 is an apocalyptic number.

It is an amenable number.

22324021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22324021 is an equidigital number, since it uses as much as digits as its factorization.

22324021 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 22324021 is about 4724.8302615015. The cubic root of 22324021 is about 281.5728699664.

Adding to 22324021 its reverse (12042322), we get a palindrome (34366343).

The spelling of 22324021 in words is "twenty-two million, three hundred twenty-four thousand, twenty-one".