243420255 has 64 divisors (see below), whose sum is σ = 475009920. Its totient is φ = 117531648.

The previous prime is 243420227. The next prime is 243420283. The reversal of 243420255 is 552024342.

It is a happy number.

243420255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243420227) and next prime (243420283).

It is not a de Polignac number, because 243420255 - 2⁵ = 243420223 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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91707 + ... + 94323.

It is an arithmetic number, because the mean of its divisors is an integer number (7422030).

Almost surely, 2^243420255 is an apocalyptic number.

243420255 is a deficient number, since it is larger than the sum of its proper divisors (231589665).

243420255 is a wasteful number, since it uses less digits than its factorization.

243420255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2691 counting only the distinct ones).

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

The square root of 243420255 is about 15601.9311304723. The cubic root of 243420255 is about 624.3846786729.

Adding to 243420255 its reverse (552024342), we get a palindrome (795444597).

The spelling of 243420255 in words is "two hundred forty-three million, four hundred twenty thousand, two hundred fifty-five".