222420642 has 16 divisors (see below), whose sum is σ = 445046400. Its totient is φ = 74106032.

The previous prime is 222420607. The next prime is 222420643. The reversal of 222420642 is 246024222.

222420642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (222420643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8023 + ... + 22565.

It is an arithmetic number, because the mean of its divisors is an integer number (27815400).

Almost surely, 2^222420642 is an apocalyptic number.

222420642 is an abundant number, since it is smaller than the sum of its proper divisors (222625758).

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

222420642 is a wasteful number, since it uses less digits than its factorization.

222420642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17097.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 222420642 is about 14913.7735667402. The cubic root of 222420642 is about 605.8870869805.

Adding to 222420642 its reverse (246024222), we get a palindrome (468444864).

The spelling of 222420642 in words is "two hundred twenty-two million, four hundred twenty thousand, six hundred forty-two".