203131111319 has 4 divisors (see below), whose sum is σ = 207855090696. Its totient is φ = 198407131944.

The previous prime is 203131111297. The next prime is 203131111343. The reversal of 203131111319 is 913111131302.

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

It is a cyclic number.

It is not a de Polignac number, because 203131111319 - 2¹⁶ = 203131045783 is a prime.

It is a super-2 number, since 2×203131111319² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203131113319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2361989624 + ... + 2361989709.

It is an arithmetic number, because the mean of its divisors is an integer number (51963772674).

Almost surely, 2^203131111319 is an apocalyptic number.

203131111319 is a deficient number, since it is larger than the sum of its proper divisors (4723979377).

203131111319 is an equidigital number, since it uses as much as digits as its factorization.

203131111319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723979376.

The product of its (nonzero) digits is 486, while the sum is 26.

The spelling of 203131111319 in words is "two hundred three billion, one hundred thirty-one million, one hundred eleven thousand, three hundred nineteen".