22392421 has 2 divisors, whose sum is σ = 22392422. Its totient is φ = 22392420.

The previous prime is 22392397. The next prime is 22392443. The reversal of 22392421 is 12429322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14630625 + 7761796 = 3825^2 + 2786^2 .

It is a cyclic number.

It is not a de Polignac number, because 22392421 - 2¹⁵ = 22359653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22392221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11196210 + 11196211.

It is an arithmetic number, because the mean of its divisors is an integer number (11196211).

Almost surely, 2^22392421 is an apocalyptic number.

It is an amenable number.

22392421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22392421 is an equidigital number, since it uses as much as digits as its factorization.

22392421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 22392421 is about 4732.0630807292. The cubic root of 22392421 is about 281.8601531504.

The spelling of 22392421 in words is "twenty-two million, three hundred ninety-two thousand, four hundred twenty-one".