243341253 has 20 divisors (see below), whose sum is σ = 368943520. Its totient is φ = 159802632.

The previous prime is 243341243. The next prime is 243341327. The reversal of 243341253 is 352143342.

243341253 is a `hidden beast` number, since 243 + 3 + 412 + 5 + 3 = 666.

It is not a de Polignac number, because 243341253 - 2¹³ = 243333061 is a prime.

It is a super-2 number, since 2×243341253² = 118429930823220018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243341243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16993 + ... + 27846.

It is an arithmetic number, because the mean of its divisors is an integer number (18447176).

Almost surely, 2^243341253 is an apocalyptic number.

It is an amenable number.

243341253 is a deficient number, since it is larger than the sum of its proper divisors (125602267).

243341253 is an equidigital number, since it uses as much as digits as its factorization.

243341253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44918 (or 44909 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 243341253 is about 15599.3991230432. The cubic root of 243341253 is about 624.3171233856.

Adding to 243341253 its reverse (352143342), we get a palindrome (595484595).

The spelling of 243341253 in words is "two hundred forty-three million, three hundred forty-one thousand, two hundred fifty-three".