25115222 has 16 divisors (see below), whose sum is σ = 43515792. Its totient is φ = 10744320.

The previous prime is 25115221. The next prime is 25115227. The reversal of 25115222 is 22251152.

It is a happy number.

It is a super-2 number, since 2×25115222² = 1261548752218568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25115194 and 25115203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115221) 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, 33203 + ... + 33950.

It is an arithmetic number, because the mean of its divisors is an integer number (2719737).

Almost surely, 2^25115222 is an apocalyptic number.

25115222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25115222 is a deficient number, since it is larger than the sum of its proper divisors (18400570).

25115222 is a wasteful number, since it uses less digits than its factorization.

25115222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67183.

The product of its digits is 400, while the sum is 20.

The square root of 25115222 is about 5011.5089543969. The cubic root of 25115222 is about 292.8503003529.

Adding to 25115222 its reverse (22251152), we get a palindrome (47366374).

The spelling of 25115222 in words is "twenty-five million, one hundred fifteen thousand, two hundred twenty-two".