243131253 has 8 divisors (see below), whose sum is σ = 324272928. Its totient is φ = 162038544.

The previous prime is 243131249. The next prime is 243131257. The reversal of 243131253 is 352131342.

It is an interprime number because it is at equal distance from previous prime (243131249) and next prime (243131257).

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

It is not a de Polignac number, because 243131253 - 2² = 243131249 is a prime.

It is a super-2 number, since 2×243131253² = 118225612370700018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243131257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 22107.

It is an arithmetic number, because the mean of its divisors is an integer number (40534116).

Almost surely, 2^243131253 is an apocalyptic number.

It is an amenable number.

243131253 is a deficient number, since it is larger than the sum of its proper divisors (81141675).

243131253 is a wasteful number, since it uses less digits than its factorization.

243131253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24483.

The product of its digits is 2160, while the sum is 24.

The square root of 243131253 is about 15592.6666417262. Note that the first 4 decimals coincide. The cubic root of 243131253 is about 624.1374794676.

Adding to 243131253 its reverse (352131342), we get a palindrome (595262595).

The spelling of 243131253 in words is "two hundred forty-three million, one hundred thirty-one thousand, two hundred fifty-three".