243272451 has 4 divisors (see below), whose sum is σ = 324363272. Its totient is φ = 162181632.

The previous prime is 243272443. The next prime is 243272461. The reversal of 243272451 is 154272342.

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

It is not a de Polignac number, because 243272451 - 2³ = 243272443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243272441) 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, 40545406 + ... + 40545411.

It is an arithmetic number, because the mean of its divisors is an integer number (81090818).

Almost surely, 2^243272451 is an apocalyptic number.

243272451 is a deficient number, since it is larger than the sum of its proper divisors (81090821).

243272451 is an equidigital number, since it uses as much as digits as its factorization.

243272451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81090820.

The product of its digits is 13440, while the sum is 30.

The square root of 243272451 is about 15597.1936898918. The cubic root of 243272451 is about 624.2582782931.

The spelling of 243272451 in words is "two hundred forty-three million, two hundred seventy-two thousand, four hundred fifty-one".