25145222 has 4 divisors (see below), whose sum is σ = 37717836. Its totient is φ = 12572610.

The previous prime is 25145221. The next prime is 25145273. The reversal of 25145222 is 22254152.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25145221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6286304 + ... + 6286307.

It is an arithmetic number, because the mean of its divisors is an integer number (9429459).

Almost surely, 2^25145222 is an apocalyptic number.

25145222 is a deficient number, since it is larger than the sum of its proper divisors (12572614).

25145222 is a wasteful number, since it uses less digits than its factorization.

25145222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12572613.

The product of its digits is 1600, while the sum is 23.

The square root of 25145222 is about 5014.5011716022. The cubic root of 25145222 is about 292.9668566688.

Adding to 25145222 its reverse (22254152), we get a palindrome (47399374).

The spelling of 25145222 in words is "twenty-five million, one hundred forty-five thousand, two hundred twenty-two".