243120222445 has 4 divisors (see below), whose sum is σ = 291744266940. Its totient is φ = 194496177952.

The previous prime is 243120222431. The next prime is 243120222467. The reversal of 243120222445 is 544222021342.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25447587529 + 217672634916 = 159523^2 + 466554^2 .

It is a cyclic number.

It is not a de Polignac number, because 243120222445 - 2⁵ = 243120222413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24312022240 + ... + 24312022249.

It is an arithmetic number, because the mean of its divisors is an integer number (72936066735).

Almost surely, 2^243120222445 is an apocalyptic number.

It is an amenable number.

243120222445 is a deficient number, since it is larger than the sum of its proper divisors (48624044495).

243120222445 is an equidigital number, since it uses as much as digits as its factorization.

243120222445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48624044494.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 243120222445 its reverse (544222021342), we get a palindrome (787342243787).

The spelling of 243120222445 in words is "two hundred forty-three billion, one hundred twenty million, two hundred twenty-two thousand, four hundred forty-five".