243420212403 has 12 divisors (see below), whose sum is σ = 351617932120. Its totient is φ = 162275083776.

The previous prime is 243420212389. The next prime is 243420212407. The reversal of 243420212403 is 304212024342.

243420212403 is a `hidden beast` number, since 2 + 4 + 3 + 42 + 0 + 212 + 403 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-243420212403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243420212407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104101 + ... + 705462.

Almost surely, 2^243420212403 is an apocalyptic number.

243420212403 is a deficient number, since it is larger than the sum of its proper divisors (108197719717).

243420212403 is a wasteful number, since it uses less digits than its factorization.

243420212403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842978 (or 842975 counting only the distinct ones).

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

Adding to 243420212403 its reverse (304212024342), we get a palindrome (547632236745).

The spelling of 243420212403 in words is "two hundred forty-three billion, four hundred twenty million, two hundred twelve thousand, four hundred three".