22221025 has 12 divisors (see below), whose sum is σ = 27676800. Its totient is φ = 17697680.

The previous prime is 22221007. The next prime is 22221029. The reversal of 22221025 is 52012222.

It is a de Polignac number, because none of the positive numbers 2^k-22221025 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22221029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4116 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (2306400).

Almost surely, 2^22221025 is an apocalyptic number.

22221025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22221025 is a deficient number, since it is larger than the sum of its proper divisors (5455775).

22221025 is a wasteful number, since it uses less digits than its factorization.

22221025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 3963 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22221025 is about 4713.9182216072. The cubic root of 22221025 is about 281.1391727949.

Adding to 22221025 its reverse (52012222), we get a palindrome (74233247).

The spelling of 22221025 in words is "twenty-two million, two hundred twenty-one thousand, twenty-five".