222243645 has 32 divisors (see below), whose sum is σ = 393305472. Its totient is φ = 106451712.

The previous prime is 222243643. The next prime is 222243649. The reversal of 222243645 is 546342222.

It is not a de Polignac number, because 222243645 - 2¹ = 222243643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222243643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8187 + ... + 22616.

It is an arithmetic number, because the mean of its divisors is an integer number (12290796).

Almost surely, 2^222243645 is an apocalyptic number.

It is an amenable number.

222243645 is a deficient number, since it is larger than the sum of its proper divisors (171061827).

222243645 is a wasteful number, since it uses less digits than its factorization.

222243645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30861.

The product of its digits is 23040, while the sum is 30.

The square root of 222243645 is about 14907.8383744928. The cubic root of 222243645 is about 605.7263275373.

Adding to 222243645 its reverse (546342222), we get a palindrome (768585867).

The spelling of 222243645 in words is "two hundred twenty-two million, two hundred forty-three thousand, six hundred forty-five".