243155347 has 4 divisors (see below), whose sum is σ = 245386240. Its totient is φ = 240924456.

The previous prime is 243155323. The next prime is 243155371. The reversal of 243155347 is 743551342.

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 (243155323) and next prime (243155371).

It is a cyclic number.

It is not a de Polignac number, because 243155347 - 2¹¹ = 243153299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243155317) 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, 1115283 + ... + 1115500.

It is an arithmetic number, because the mean of its divisors is an integer number (61346560).

Almost surely, 2^243155347 is an apocalyptic number.

243155347 is a deficient number, since it is larger than the sum of its proper divisors (2230893).

243155347 is a wasteful number, since it uses less digits than its factorization.

243155347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230892.

The product of its digits is 50400, while the sum is 34.

The square root of 243155347 is about 15593.4392293682. The cubic root of 243155347 is about 624.1580958651.

The spelling of 243155347 in words is "two hundred forty-three million, one hundred fifty-five thousand, three hundred forty-seven".