243121353 has 8 divisors (see below), whose sum is σ = 324416928. Its totient is φ = 161953344.

The previous prime is 243121343. The next prime is 243121357. The reversal of 243121353 is 353121342.

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

It is not a de Polignac number, because 243121353 - 2⁶ = 243121289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243121357) 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, 27351 + ... + 35132.

It is an arithmetic number, because the mean of its divisors is an integer number (40552116).

Almost surely, 2^243121353 is an apocalyptic number.

It is an amenable number.

243121353 is a deficient number, since it is larger than the sum of its proper divisors (81295575).

243121353 is a wasteful number, since it uses less digits than its factorization.

243121353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63783.

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

The square root of 243121353 is about 15592.3491815698. The cubic root of 243121353 is about 624.1290079872.

Adding to 243121353 its reverse (353121342), we get a palindrome (596242695).

The spelling of 243121353 in words is "two hundred forty-three million, one hundred twenty-one thousand, three hundred fifty-three".