243431155 has 8 divisors (see below), whose sum is σ = 318673584. Its totient is φ = 177040800.

The previous prime is 243431141. The next prime is 243431159. The reversal of 243431155 is 551134342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243431155 - 2²¹ = 241334003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243431159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212956 + ... + 2213065.

It is an arithmetic number, because the mean of its divisors is an integer number (39834198).

Almost surely, 2^243431155 is an apocalyptic number.

243431155 is a deficient number, since it is larger than the sum of its proper divisors (75242429).

243431155 is a wasteful number, since it uses less digits than its factorization.

243431155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426037.

The product of its digits is 7200, while the sum is 28.

The square root of 243431155 is about 15602.2804422943. The cubic root of 243431155 is about 624.3939982088.

Adding to 243431155 its reverse (551134342), we get a palindrome (794565497).

The spelling of 243431155 in words is "two hundred forty-three million, four hundred thirty-one thousand, one hundred fifty-five".