22302421 has 8 divisors (see below), whose sum is σ = 23333400. Its totient is φ = 21288960.

The previous prime is 22302391. The next prime is 22302431. The reversal of 22302421 is 12420322.

It can be written as a sum of positive squares in 4 ways, for example, as 108900 + 22193521 = 330^2 + 4711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22302421 - 2¹³ = 22294229 is a prime.

It is a super-2 number, since 2×22302421² = 994795964922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22302395 and 22302404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22302431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (2916675).

Almost surely, 2^22302421 is an apocalyptic number.

It is an amenable number.

22302421 is a deficient number, since it is larger than the sum of its proper divisors (1030979).

22302421 is an equidigital number, since it uses as much as digits as its factorization.

22302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8759.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22302421 is about 4722.5439119187. The cubic root of 22302421 is about 281.4820270635.

Adding to 22302421 its reverse (12420322), we get a palindrome (34722743).

The spelling of 22302421 in words is "twenty-two million, three hundred two thousand, four hundred twenty-one".