25222645 has 16 divisors (see below), whose sum is σ = 36626688. Its totient is φ = 16277760.

The previous prime is 25222643. The next prime is 25222649. The reversal of 25222645 is 54622252.

It is not a de Polignac number, because 25222645 - 2¹ = 25222643 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25222643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20601 + ... + 21790.

It is an arithmetic number, because the mean of its divisors is an integer number (2289168).

Almost surely, 2^25222645 is an apocalyptic number.

It is an amenable number.

25222645 is a deficient number, since it is larger than the sum of its proper divisors (11404043).

25222645 is a wasteful number, since it uses less digits than its factorization.

25222645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42420.

The product of its digits is 9600, while the sum is 28.

The square root of 25222645 is about 5022.2151487167. The cubic root of 25222645 is about 293.2672335853.

Adding to 25222645 its reverse (54622252), we get a palindrome (79844897).

The spelling of 25222645 in words is "twenty-five million, two hundred twenty-two thousand, six hundred forty-five".