22421407 has 4 divisors (see below), whose sum is σ = 22452976. Its totient is φ = 22389840.

The previous prime is 22421393. The next prime is 22421411. The reversal of 22421407 is 70412422.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22421407 - 2¹¹ = 22419359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14694 + ... + 16147.

It is an arithmetic number, because the mean of its divisors is an integer number (5613244).

Almost surely, 2^22421407 is an apocalyptic number.

22421407 is a deficient number, since it is larger than the sum of its proper divisors (31569).

22421407 is an equidigital number, since it uses as much as digits as its factorization.

22421407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31568.

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

The square root of 22421407 is about 4735.1248135609. The cubic root of 22421407 is about 281.9817192180.

Adding to 22421407 its reverse (70412422), we get a palindrome (92833829).

The spelling of 22421407 in words is "twenty-two million, four hundred twenty-one thousand, four hundred seven".