222540212 has 24 divisors (see below), whose sum is σ = 398200320. Its totient is φ = 108789440.

The previous prime is 222540209. The next prime is 222540233. The reversal of 222540212 is 212045222.

222540212 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42608 + ... + 47544.

It is an arithmetic number, because the mean of its divisors is an integer number (16591680).

Almost surely, 2^222540212 is an apocalyptic number.

It is an amenable number.

222540212 is a deficient number, since it is larger than the sum of its proper divisors (175660108).

222540212 is a wasteful number, since it uses less digits than its factorization.

222540212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 222540212 is about 14917.7817385830. The cubic root of 222540212 is about 605.9956394666.

Adding to 222540212 its reverse (212045222), we get a palindrome (434585434).

The spelling of 222540212 in words is "two hundred twenty-two million, five hundred forty thousand, two hundred twelve".