243404020143 has 20 divisors (see below), whose sum is σ = 363690596368. Its totient is φ = 162230493600.

The previous prime is 243404020121. The next prime is 243404020177. The reversal of 243404020143 is 341020404342.

It is a happy number.

243404020143 is a `hidden beast` number, since 243 + 4 + 0 + 402 + 0 + 14 + 3 = 666.

It is not a de Polignac number, because 243404020143 - 2¹² = 243404016047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243404020943) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17371 + ... + 697932.

Almost surely, 2^243404020143 is an apocalyptic number.

243404020143 is a deficient number, since it is larger than the sum of its proper divisors (120286576225).

243404020143 is an equidigital number, since it uses as much as digits as its factorization.

243404020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719516 (or 719507 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 243404020143 its reverse (341020404342), we get a palindrome (584424424485).

The spelling of 243404020143 in words is "two hundred forty-three billion, four hundred four million, twenty thousand, one hundred forty-three".