222126550 has 12 divisors (see below), whose sum is σ = 413155476. Its totient is φ = 88850600.

The previous prime is 222126547. The next prime is 222126557. The reversal of 222126550 is 55621222.

It is a happy number.

222126550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222126557) 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, 2221216 + ... + 2221315.

It is an arithmetic number, because the mean of its divisors is an integer number (34429623).

Almost surely, 2^222126550 is an apocalyptic number.

222126550 is a deficient number, since it is larger than the sum of its proper divisors (191028926).

222126550 is a wasteful number, since it uses less digits than its factorization.

222126550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442543 (or 4442538 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 222126550 is about 14903.9105606549. The cubic root of 222126550 is about 605.6199278175.

Adding to 222126550 its reverse (55621222), we get a palindrome (277747772).

The spelling of 222126550 in words is "two hundred twenty-two million, one hundred twenty-six thousand, five hundred fifty".