243430319 has 4 divisors (see below), whose sum is σ = 265560360. Its totient is φ = 221300280.

The previous prime is 243430307. The next prime is 243430333. The reversal of 243430319 is 913034342.

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 243430319 - 2²⁰ = 242381743 is a prime.

It is a super-2 number, since 2×243430319² = 118516640416883522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243430291 and 243430300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243430349) 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, 11065004 + ... + 11065025.

It is an arithmetic number, because the mean of its divisors is an integer number (66390090).

Almost surely, 2^243430319 is an apocalyptic number.

243430319 is a deficient number, since it is larger than the sum of its proper divisors (22130041).

243430319 is a wasteful number, since it uses less digits than its factorization.

243430319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22130040.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 243430319 is about 15602.2536513159. The cubic root of 243430319 is about 624.3932834359.

It can be divided in two parts, 24 and 3430319, that added together give a palindrome (3430343).

The spelling of 243430319 in words is "two hundred forty-three million, four hundred thirty thousand, three hundred nineteen".