243255405 has 16 divisors (see below), whose sum is σ = 392848704. Its totient is φ = 128522880.

The previous prime is 243255401. The next prime is 243255437. The reversal of 243255405 is 504552342.

It is not a de Polignac number, because 243255405 - 2² = 243255401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243255401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74176 + ... + 77385.

It is an arithmetic number, because the mean of its divisors is an integer number (24553044).

Almost surely, 2^243255405 is an apocalyptic number.

It is an amenable number.

243255405 is a deficient number, since it is larger than the sum of its proper divisors (149593299).

243255405 is a wasteful number, since it uses less digits than its factorization.

243255405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151676.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 243255405 is about 15596.6472358645. The cubic root of 243255405 is about 624.2436974461.

The spelling of 243255405 in words is "two hundred forty-three million, two hundred fifty-five thousand, four hundred five".