243120454051 has 4 divisors (see below), whose sum is σ = 246049616232. Its totient is φ = 240191291872.

The previous prime is 243120454039. The next prime is 243120454061. The reversal of 243120454051 is 150454021342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243120454051 - 2⁵ = 243120454019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243120454061) 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, 1464580966 + ... + 1464581131.

It is an arithmetic number, because the mean of its divisors is an integer number (61512404058).

Almost surely, 2^243120454051 is an apocalyptic number.

243120454051 is a deficient number, since it is larger than the sum of its proper divisors (2929162181).

243120454051 is an equidigital number, since it uses as much as digits as its factorization.

243120454051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929162180.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 243120454051 its reverse (150454021342), we get a palindrome (393574475393).

The spelling of 243120454051 in words is "two hundred forty-three billion, one hundred twenty million, four hundred fifty-four thousand, fifty-one".