243404123433245 has 4 divisors (see below), whose sum is σ = 292084948119900. Its totient is φ = 194723298746592.

The previous prime is 243404123433221. The next prime is 243404123433337. The reversal of 243404123433245 is 542334321404342.

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 149684898838084 + 93719224595161 = 12234578^2 + 9680869^2 .

It is a cyclic number.

It is not a de Polignac number, because 243404123433245 - 2¹⁸ = 243404123171101 is a prime.

It is a super-4 number, since 4×243404123433245⁴ (a number of 59 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243404123433196 and 243404123433205.

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, 24340412343320 + ... + 24340412343329.

It is an arithmetic number, because the mean of its divisors is an integer number (73021237029975).

Almost surely, 2^{243404123433245} is an apocalyptic number.

It is an amenable number.

243404123433245 is a deficient number, since it is larger than the sum of its proper divisors (48680824686655).

243404123433245 is an equidigital number, since it uses as much as digits as its factorization.

243404123433245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48680824686654.

The product of its (nonzero) digits is 3317760, while the sum is 44.

Adding to 243404123433245 its reverse (542334321404342), we get a palindrome (785738444837587).

The spelling of 243404123433245 in words is "two hundred forty-three trillion, four hundred four billion, one hundred twenty-three million, four hundred thirty-three thousand, two hundred forty-five".