243222440 has 16 divisors (see below), whose sum is σ = 547250580. Its totient is φ = 97288960.

The previous prime is 243222407. The next prime is 243222457. The reversal of 243222440 is 44222342.

It can be written as a sum of positive squares in 2 ways, for example, as 240312004 + 2910436 = 15502^2 + 1706^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040241 + ... + 3040320.

Almost surely, 2^243222440 is an apocalyptic number.

243222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243222440 is an abundant number, since it is smaller than the sum of its proper divisors (304028140).

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

243222440 is a wasteful number, since it uses less digits than its factorization.

243222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080572 (or 6080568 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 243222440 is about 15595.5904024182. The cubic root of 243222440 is about 624.2154978355.

Adding to 243222440 its reverse (44222342), we get a palindrome (287444782).

It can be divided in two parts, 24322 and 2440, that added together give a palindrome (26762).

The spelling of 243222440 in words is "two hundred forty-three million, two hundred twenty-two thousand, four hundred forty".