243420504031 has 4 divisors (see below), whose sum is σ = 246353281272. Its totient is φ = 240487726792.

The previous prime is 243420503981. The next prime is 243420504121. The reversal of 243420504031 is 130405024342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243420504031 - 2¹⁵ = 243420471263 is a prime.

It is a super-2 number, since 2×243420504031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420504731) 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, 1466388496 + ... + 1466388661.

It is an arithmetic number, because the mean of its divisors is an integer number (61588320318).

Almost surely, 2^243420504031 is an apocalyptic number.

243420504031 is a deficient number, since it is larger than the sum of its proper divisors (2932777241).

243420504031 is an equidigital number, since it uses as much as digits as its factorization.

243420504031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932777240.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 243420504031 its reverse (130405024342), we get a palindrome (373825528373).

The spelling of 243420504031 in words is "two hundred forty-three billion, four hundred twenty million, five hundred four thousand, thirty-one".