243505031429 has 4 divisors (see below), whose sum is σ = 265641852480. Its totient is φ = 221368210380.

The previous prime is 243505031411. The next prime is 243505031431. The reversal of 243505031429 is 924130505342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243505031429 - 2⁸ = 243505031173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243505031392 and 243505031401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243505031449) by changing a digit.

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, 11068410509 + ... + 11068410530.

It is an arithmetic number, because the mean of its divisors is an integer number (66410463120).

Almost surely, 2^243505031429 is an apocalyptic number.

It is an amenable number.

243505031429 is a deficient number, since it is larger than the sum of its proper divisors (22136821051).

243505031429 is a wasteful number, since it uses less digits than its factorization.

243505031429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22136821050.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 243505031429 in words is "two hundred forty-three billion, five hundred five million, thirty-one thousand, four hundred twenty-nine".