203212423305 has 24 divisors (see below), whose sum is σ = 354270920328. Its totient is φ = 107753481216.

The previous prime is 203212423301. The next prime is 203212423321. The reversal of 203212423305 is 503324212302.

203212423305 is a `hidden beast` number, since 2 + 0 + 321 + 2 + 4 + 2 + 330 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 63268347024 + 139944076281 = 251532^2 + 374091^2 .

It is not a de Polignac number, because 203212423305 - 2² = 203212423301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203212423301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13043752 + ... + 13059321.

It is an arithmetic number, because the mean of its divisors is an integer number (14761288347).

Almost surely, 2^203212423305 is an apocalyptic number.

It is an amenable number.

203212423305 is a deficient number, since it is larger than the sum of its proper divisors (151058497023).

203212423305 is a wasteful number, since it uses less digits than its factorization.

203212423305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26103257 (or 26103254 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 203212423305 its reverse (503324212302), we get a palindrome (706536635607).

The spelling of 203212423305 in words is "two hundred three billion, two hundred twelve million, four hundred twenty-three thousand, three hundred five".