25222615 has 8 divisors (see below), whose sum is σ = 33018768. Its totient is φ = 18343680.

The previous prime is 25222583. The next prime is 25222643. The reversal of 25222615 is 51622252.

It is a happy number.

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

It is not a de Polignac number, because 25222615 - 2⁵ = 25222583 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 25222615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229242 + ... + 229351.

It is an arithmetic number, because the mean of its divisors is an integer number (4127346).

Almost surely, 2^25222615 is an apocalyptic number.

25222615 is a deficient number, since it is larger than the sum of its proper divisors (7796153).

25222615 is a wasteful number, since it uses less digits than its factorization.

25222615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458609.

The product of its digits is 2400, while the sum is 25.

The square root of 25222615 is about 5022.2121619860. The cubic root of 25222615 is about 293.2671173139.

Adding to 25222615 its reverse (51622252), we get a palindrome (76844867).

The spelling of 25222615 in words is "twenty-five million, two hundred twenty-two thousand, six hundred fifteen".