243255400 has 24 divisors (see below), whose sum is σ = 565569270. Its totient is φ = 97302080.

The previous prime is 243255391. The next prime is 243255401. The reversal of 243255400 is 4552342.

It can be written as a sum of positive squares in 3 ways, for example, as 138438756 + 104816644 = 11766^2 + 10238^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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 5 ways as a sum of consecutive naturals, for example, 607939 + ... + 608338.

Almost surely, 2^243255400 is an apocalyptic number.

243255400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243255400 is an abundant number, since it is smaller than the sum of its proper divisors (322313870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243255400 is a wasteful number, since it uses less digits than its factorization.

243255400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216293 (or 1216284 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 243255400 is about 15596.6470755736. The cubic root of 243255400 is about 624.2436931691.

The spelling of 243255400 in words is "two hundred forty-three million, two hundred fifty-five thousand, four hundred".