243356005 has 4 divisors (see below), whose sum is σ = 292027212. Its totient is φ = 194684800.

The previous prime is 243355999. The next prime is 243356011. The reversal of 243356005 is 500653342.

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

It is an interprime number because it is at equal distance from previous prime (243355999) and next prime (243356011).

It can be written as a sum of positive squares in 2 ways, for example, as 136399041 + 106956964 = 11679^2 + 10342^2 .

It is not a de Polignac number, because 243356005 - 2¹³ = 243347813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24335596 + ... + 24335605.

It is an arithmetic number, because the mean of its divisors is an integer number (73006803).

Almost surely, 2^243356005 is an apocalyptic number.

It is an amenable number.

243356005 is a deficient number, since it is larger than the sum of its proper divisors (48671207).

243356005 is an equidigital number, since it uses as much as digits as its factorization.

243356005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48671206.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 243356005 is about 15599.8719546027. The cubic root of 243356005 is about 624.3297390574.

The spelling of 243356005 in words is "two hundred forty-three million, three hundred fifty-six thousand, five".