222216725 has 6 divisors (see below), whose sum is σ = 275548770. Its totient is φ = 177773360.

The previous prime is 222216697. The next prime is 222216727. The reversal of 222216725 is 527612222.

222216725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 27889 + 222188836 = 167^2 + 14906^2 .

It is not a de Polignac number, because 222216725 - 2⁶ = 222216661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222216727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4444310 + ... + 4444359.

It is an arithmetic number, because the mean of its divisors is an integer number (45924795).

Almost surely, 2^222216725 is an apocalyptic number.

222216725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

222216725 is a deficient number, since it is larger than the sum of its proper divisors (53332045).

222216725 is an equidigital number, since it uses as much as digits as its factorization.

222216725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888679 (or 8888674 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 222216725 is about 14906.9354664196. The cubic root of 222216725 is about 605.7018696783.

Adding to 222216725 its reverse (527612222), we get a palindrome (749828947).

The spelling of 222216725 in words is "two hundred twenty-two million, two hundred sixteen thousand, seven hundred twenty-five".