22232421 has 16 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 14176800.

The previous prime is 22232407. The next prime is 22232429. The reversal of 22232421 is 12423222.

It is not a de Polignac number, because 22232421 - 2⁵ = 22232389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22232394 and 22232403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22232429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17280 + ... + 18521.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^22232421 is an apocalyptic number.

It is an amenable number.

22232421 is a deficient number, since it is larger than the sum of its proper divisors (12137499).

22232421 is a wasteful number, since it uses less digits than its factorization.

22232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35833 (or 35827 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 22232421 is about 4715.1268275625. The cubic root of 22232421 is about 281.1872251008.

Adding to 22232421 its reverse (12423222), we get a palindrome (34655643).

The spelling of 22232421 in words is "twenty-two million, two hundred thirty-two thousand, four hundred twenty-one".