223440442 has 8 divisors (see below), whose sum is σ = 335234196. Its totient is φ = 111695712.

The previous prime is 223440439. The next prime is 223440443. The reversal of 223440442 is 244044322.

It can be written as a sum of positive squares in 2 ways, for example, as 219602761 + 3837681 = 14819^2 + 1959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×223440442² = 99851262242310728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (223440443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2878 + ... + 21334.

Almost surely, 2^223440442 is an apocalyptic number.

223440442 is a deficient number, since it is larger than the sum of its proper divisors (111793754).

223440442 is a wasteful number, since it uses less digits than its factorization.

223440442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24512.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 223440442 is about 14947.9243375125. The cubic root of 223440442 is about 606.8116740009.

Adding to 223440442 its reverse (244044322), we get a palindrome (467484764).

The spelling of 223440442 in words is "two hundred twenty-three million, four hundred forty thousand, four hundred forty-two".