243200019 has 8 divisors (see below), whose sum is σ = 341333440. Its totient is φ = 153599976.

The previous prime is 243199973. The next prime is 243200039. The reversal of 243200019 is 910002342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243200019 - 2⁸ = 243199763 is a prime.

It is a super-2 number, since 2×243200019² = 118292498483200722, 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 = 243199968 and 243200004.

It is not an unprimeable number, because it can be changed into a prime (243200039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133277 + ... + 2133390.

It is an arithmetic number, because the mean of its divisors is an integer number (42666680).

Almost surely, 2^243200019 is an apocalyptic number.

243200019 is a deficient number, since it is larger than the sum of its proper divisors (98133421).

243200019 is a wasteful number, since it uses less digits than its factorization.

243200019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266689.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 243200019 is about 15594.8715608690. The cubic root of 243200019 is about 624.1963165383.

The spelling of 243200019 in words is "two hundred forty-three million, two hundred thousand, nineteen".