222220424 has 8 divisors (see below), whose sum is σ = 416663310. Its totient is φ = 111110208.

The previous prime is 222220357. The next prime is 222220429. The reversal of 222220424 is 424022222.

It can be written as a sum of positive squares in only one way, i.e., 158508100 + 63712324 = 12590^2 + 7982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 222220396 and 222220405.

It is not an unprimeable number, because it can be changed into a prime (222220429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888769 + ... + 13888784.

Almost surely, 2^222220424 is an apocalyptic number.

It is an amenable number.

222220424 is a deficient number, since it is larger than the sum of its proper divisors (194442886).

222220424 is a wasteful number, since it uses less digits than its factorization.

222220424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27777559 (or 27777555 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 222220424 is about 14907.0595356697. The cubic root of 222220424 is about 605.7052304797.

Adding to 222220424 its reverse (424022222), we get a palindrome (646242646).

The spelling of 222220424 in words is "two hundred twenty-two million, two hundred twenty thousand, four hundred twenty-four".