243452005 has 4 divisors (see below), whose sum is σ = 292142412. Its totient is φ = 194761600.

The previous prime is 243452003. The next prime is 243452029. The reversal of 243452005 is 500254342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134165889 + 109286116 = 11583^2 + 10454^2 .

It is not a de Polignac number, because 243452005 - 2¹ = 243452003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243452003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24345196 + ... + 24345205.

It is an arithmetic number, because the mean of its divisors is an integer number (73035603).

Almost surely, 2^243452005 is an apocalyptic number.

It is an amenable number.

243452005 is a deficient number, since it is larger than the sum of its proper divisors (48690407).

243452005 is an equidigital number, since it uses as much as digits as its factorization.

243452005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48690406.

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

The square root of 243452005 is about 15602.9485995436. The cubic root of 243452005 is about 624.4118242525.

The spelling of 243452005 in words is "two hundred forty-three million, four hundred fifty-two thousand, five".