243220144 has 40 divisors (see below), whose sum is σ = 480157760. Its totient is φ = 119328768.

The previous prime is 243220099. The next prime is 243220189. The reversal of 243220144 is 441022342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243220099) and next prime (243220189).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243454 + ... + 244450.

It is an arithmetic number, because the mean of its divisors is an integer number (12003944).

Almost surely, 2^243220144 is an apocalyptic number.

It is an amenable number.

243220144 is a deficient number, since it is larger than the sum of its proper divisors (236937616).

243220144 is a wasteful number, since it uses less digits than its factorization.

243220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 243220144 is about 15595.5167916937. The cubic root of 243220144 is about 624.2135336482.

Adding to 243220144 its reverse (441022342), we get a palindrome (684242486).

The spelling of 243220144 in words is "two hundred forty-three million, two hundred twenty thousand, one hundred forty-four".