25222217 has 8 divisors (see below), whose sum is σ = 25684416. Its totient is φ = 24762672.

The previous prime is 25222213. The next prime is 25222229. The reversal of 25222217 is 71222252.

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 25222217 - 2² = 25222213 is a prime.

It is a super-3 number, since 3×25222217³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25222192 and 25222201.

It is not an unprimeable number, because it can be changed into a prime (25222213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32243 + ... + 33015.

It is an arithmetic number, because the mean of its divisors is an integer number (3210552).

Almost surely, 2^25222217 is an apocalyptic number.

It is an amenable number.

25222217 is a deficient number, since it is larger than the sum of its proper divisors (462199).

25222217 is an equidigital number, since it uses as much as digits as its factorization.

25222217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its digits is 1120, while the sum is 23.

The square root of 25222217 is about 5022.1725378565. The cubic root of 25222217 is about 293.2655747706.

Adding to 25222217 its reverse (71222252), we get a palindrome (96444469).

The spelling of 25222217 in words is "twenty-five million, two hundred twenty-two thousand, two hundred seventeen".