243153055 has 4 divisors (see below), whose sum is σ = 291783672. Its totient is φ = 194522440.

The previous prime is 243153049. The next prime is 243153077. The reversal of 243153055 is 550351342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550351342 = 2 ⋅275175671.

It is not a de Polignac number, because 243153055 - 2¹⁷ = 243021983 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, 24315301 + ... + 24315310.

It is an arithmetic number, because the mean of its divisors is an integer number (72945918).

Almost surely, 2^243153055 is an apocalyptic number.

243153055 is a deficient number, since it is larger than the sum of its proper divisors (48630617).

243153055 is an equidigital number, since it uses as much as digits as its factorization.

243153055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48630616.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 243153055 is about 15593.3657367484. The cubic root of 243153055 is about 624.1561347391.

The spelling of 243153055 in words is "two hundred forty-three million, one hundred fifty-three thousand, fifty-five".