203314923231817 has 2 divisors, whose sum is σ = 203314923231818. Its totient is φ = 203314923231816.

The previous prime is 203314923231811. The next prime is 203314923231863. The reversal of 203314923231817 is 718132329413302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101658439621561 + 101656483610256 = 10082581^2 + 10082484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203314923231817 is a prime.

It is a super-2 number, since 2×203314923231817² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203314923231811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101657461615908 + 101657461615909.

It is an arithmetic number, because the mean of its divisors is an integer number (101657461615909).

Almost surely, 2^{203314923231817} is an apocalyptic number.

It is an amenable number.

203314923231817 is a deficient number, since it is larger than the sum of its proper divisors (1).

203314923231817 is an equidigital number, since it uses as much as digits as its factorization.

203314923231817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 203314923231817 in words is "two hundred three trillion, three hundred fourteen billion, nine hundred twenty-three million, two hundred thirty-one thousand, eight hundred seventeen".