25224217 has 2 divisors, whose sum is σ = 25224218. Its totient is φ = 25224216.

The previous prime is 25224203. The next prime is 25224223. The reversal of 25224217 is 71242252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25190361 + 33856 = 5019^2 + 184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25224217 is a prime.

It is a super-2 number, since 2×25224217² = 1272522246526178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25224191 and 25224200.

It is not a weakly prime, because it can be changed into another prime (25224317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12612108 + 12612109.

It is an arithmetic number, because the mean of its divisors is an integer number (12612109).

Almost surely, 2^25224217 is an apocalyptic number.

It is an amenable number.

25224217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25224217 is an equidigital number, since it uses as much as digits as its factorization.

25224217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 25.

The square root of 25224217 is about 5022.3716509235. The cubic root of 25224217 is about 293.2733260803.

Adding to 25224217 its reverse (71242252), we get a palindrome (96466469).

The spelling of 25224217 in words is "twenty-five million, two hundred twenty-four thousand, two hundred seventeen".