243402419 has 12 divisors (see below), whose sum is σ = 264148056. Its totient is φ = 224183232.

The previous prime is 243402409. The next prime is 243402433. The reversal of 243402419 is 914204342.

It is a de Polignac number, because none of the positive numbers 2^k-243402419 is a prime.

It is a super-2 number, since 2×243402419² = 118489475150103122, 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 = 243402391 and 243402400.

It is not an unprimeable number, because it can be changed into a prime (243402409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91127 + ... + 93759.

It is an arithmetic number, because the mean of its divisors is an integer number (22012338).

Almost surely, 2^243402419 is an apocalyptic number.

243402419 is a deficient number, since it is larger than the sum of its proper divisors (20745637).

243402419 is a wasteful number, since it uses less digits than its factorization.

243402419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 243402419 is about 15601.3595240928. The cubic root of 243402419 is about 624.3694282341.

The spelling of 243402419 in words is "two hundred forty-three million, four hundred two thousand, four hundred nineteen".