203131321134 has 96 divisors (see below), whose sum is σ = 483051962880. Its totient is φ = 56766632832.

The previous prime is 203131321117. The next prime is 203131321157. The reversal of 203131321134 is 431123131302.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2444314 + ... + 2526050.

It is an arithmetic number, because the mean of its divisors is an integer number (5031791280).

Almost surely, 2^203131321134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203131321134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241525981440).

203131321134 is an abundant number, since it is smaller than the sum of its proper divisors (279920641746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203131321134 is a wasteful number, since it uses less digits than its factorization.

203131321134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81942 (or 81935 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 203131321134 its reverse (431123131302), we get a palindrome (634254452436).

The spelling of 203131321134 in words is "two hundred three billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred thirty-four".