222206724 has 18 divisors (see below), whose sum is σ = 561689310. Its totient is φ = 74068896.

The previous prime is 222206723. The next prime is 222206737. The reversal of 222206724 is 427602222.

222206724 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 only one way, i.e., 173765124 + 48441600 = 13182^2 + 6960^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (222206723) 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, 3086169 + ... + 3086240.

Almost surely, 2^222206724 is an apocalyptic number.

It is an amenable number.

222206724 is an abundant number, since it is smaller than the sum of its proper divisors (339482586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222206724 is a wasteful number, since it uses less digits than its factorization.

222206724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172419 (or 6172414 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 222206724 is about 14906.6000147586. The cubic root of 222206724 is about 605.6927828806.

Adding to 222206724 its reverse (427602222), we get a palindrome (649808946).

The spelling of 222206724 in words is "two hundred twenty-two million, two hundred six thousand, seven hundred twenty-four".