22304251 has 2 divisors, whose sum is σ = 22304252. Its totient is φ = 22304250.

The previous prime is 22304207. The next prime is 22304267. The reversal of 22304251 is 15240322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22304251 is a prime.

It is a super-2 number, since 2×22304251² = 994959225342002, which contains 22 as substring.

It is equal to p_1407133 and since 22304251 and 1407133 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22304351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11152125 + 11152126.

It is an arithmetic number, because the mean of its divisors is an integer number (11152126).

Almost surely, 2^22304251 is an apocalyptic number.

22304251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22304251 is an equidigital number, since it uses as much as digits as its factorization.

22304251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22304251 is about 4722.7376594513. The cubic root of 22304251 is about 281.4897257496.

Adding to 22304251 its reverse (15240322), we get a palindrome (37544573).

The spelling of 22304251 in words is "twenty-two million, three hundred four thousand, two hundred fifty-one".