22315247 has 2 divisors, whose sum is σ = 22315248. Its totient is φ = 22315246.

The previous prime is 22315231. The next prime is 22315261. The reversal of 22315247 is 74251322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22315247 - 2⁴ = 22315231 is a prime.

It is a super-3 number, since 3×22315247³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22315207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11157623 + 11157624.

It is an arithmetic number, because the mean of its divisors is an integer number (11157624).

Almost surely, 2^22315247 is an apocalyptic number.

22315247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22315247 is an equidigital number, since it uses as much as digits as its factorization.

22315247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 26.

The square root of 22315247 is about 4723.9016712883. The cubic root of 22315247 is about 281.5359763128.

Adding to 22315247 its reverse (74251322), we get a palindrome (96566569).

The spelling of 22315247 in words is "twenty-two million, three hundred fifteen thousand, two hundred forty-seven".