25501222 has 4 divisors (see below), whose sum is σ = 38251836. Its totient is φ = 12750610.

The previous prime is 25501199. The next prime is 25501247. The reversal of 25501222 is 22210552.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25501222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375304 + ... + 6375307.

It is an arithmetic number, because the mean of its divisors is an integer number (9562959).

Almost surely, 2^25501222 is an apocalyptic number.

25501222 is a deficient number, since it is larger than the sum of its proper divisors (12750614).

25501222 is a wasteful number, since it uses less digits than its factorization.

25501222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12750613.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25501222 is about 5049.8734637612. The cubic root of 25501222 is about 294.3429674862.

Adding to 25501222 its reverse (22210552), we get a palindrome (47711774).

The spelling of 25501222 in words is "twenty-five million, five hundred one thousand, two hundred twenty-two".