243260051 has 4 divisors (see below), whose sum is σ = 245993400. Its totient is φ = 240526704.

The previous prime is 243260041. The next prime is 243260063. The reversal of 243260051 is 150062342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243260051 - 2²⁶ = 176151187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243259999 and 243260026.

It is not an unprimeable number, because it can be changed into a prime (243260041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1366541 + ... + 1366718.

It is an arithmetic number, because the mean of its divisors is an integer number (61498350).

Almost surely, 2^243260051 is an apocalyptic number.

243260051 is a deficient number, since it is larger than the sum of its proper divisors (2733349).

243260051 is an equidigital number, since it uses as much as digits as its factorization.

243260051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733348.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 243260051 is about 15596.7961774205. The cubic root of 243260051 is about 624.2476716199.

The spelling of 243260051 in words is "two hundred forty-three million, two hundred sixty thousand, fifty-one".