203115135117493 has 2 divisors, whose sum is σ = 203115135117494. Its totient is φ = 203115135117492.

The previous prime is 203115135117449. The next prime is 203115135117569. The reversal of 203115135117493 is 394711531511302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169319899240804 + 33795235876689 = 13012298^2 + 5813367^2 .

It is a cyclic number.

It is not a de Polignac number, because 203115135117493 - 2⁹ = 203115135116981 is a prime.

It is a super-2 number, since 2×203115135117493² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203115135117443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101557567558746 + 101557567558747.

It is an arithmetic number, because the mean of its divisors is an integer number (101557567558747).

Almost surely, 2^{203115135117493} is an apocalyptic number.

It is an amenable number.

203115135117493 is a deficient number, since it is larger than the sum of its proper divisors (1).

203115135117493 is an equidigital number, since it uses as much as digits as its factorization.

203115135117493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 46.

Adding to 203115135117493 its reverse (394711531511302), we get a palindrome (597826666628795).

The spelling of 203115135117493 in words is "two hundred three trillion, one hundred fifteen billion, one hundred thirty-five million, one hundred seventeen thousand, four hundred ninety-three".