243320419 has 4 divisors (see below), whose sum is σ = 243461920. Its totient is φ = 243178920.

The previous prime is 243320387. The next prime is 243320431. The reversal of 243320419 is 914023342.

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 243320419 - 2⁵ = 243320387 is a prime.

It is a super-2 number, since 2×243320419² = 118409652604671122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243320449) 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, 68139 + ... + 71620.

It is an arithmetic number, because the mean of its divisors is an integer number (60865480).

Almost surely, 2^243320419 is an apocalyptic number.

243320419 is a deficient number, since it is larger than the sum of its proper divisors (141501).

243320419 is a wasteful number, since it uses less digits than its factorization.

243320419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141500.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 243320419 is about 15598.7313266176. The cubic root of 243320419 is about 624.2993056174.

The spelling of 243320419 in words is "two hundred forty-three million, three hundred twenty thousand, four hundred nineteen".