243054405 has 32 divisors (see below), whose sum is σ = 471381120. Its totient is φ = 117843840.

The previous prime is 243054397. The next prime is 243054431. The reversal of 243054405 is 504450342.

It is not a de Polignac number, because 243054405 - 2³ = 243054397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 80352 + ... + 83321.

It is an arithmetic number, because the mean of its divisors is an integer number (14730660).

Almost surely, 2^243054405 is an apocalyptic number.

It is an amenable number.

243054405 is a deficient number, since it is larger than the sum of its proper divisors (228326715).

243054405 is a wasteful number, since it uses less digits than its factorization.

243054405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163698 (or 163692 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 243054405 is about 15590.2022116456. The cubic root of 243054405 is about 624.0717142060.

The spelling of 243054405 in words is "two hundred forty-three million, fifty-four thousand, four hundred five".