243120053 has 4 divisors (see below), whose sum is σ = 265221888. Its totient is φ = 221018220.

The previous prime is 243120047. The next prime is 243120083. The reversal of 243120053 is 350021342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243120053 - 2⁸ = 243119797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120083) 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, 11050901 + ... + 11050922.

It is an arithmetic number, because the mean of its divisors is an integer number (66305472).

Almost surely, 2^243120053 is an apocalyptic number.

It is an amenable number.

243120053 is a deficient number, since it is larger than the sum of its proper divisors (22101835).

243120053 is a wasteful number, since it uses less digits than its factorization.

243120053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101834.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 243120053 is about 15592.3074944025. The cubic root of 243120053 is about 624.1278955535.

Adding to 243120053 its reverse (350021342), we get a palindrome (593141395).

The spelling of 243120053 in words is "two hundred forty-three million, one hundred twenty thousand, fifty-three".