1131313203 has 16 divisors (see below), whose sum is σ = 1677132960. Its totient is φ = 753707808.

The previous prime is 1131313201. The next prime is 1131313237. The reversal of 1131313203 is 3023131311.

It is a happy number.

It is not a de Polignac number, because 1131313203 - 2¹ = 1131313201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131313201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30001 + ... + 56237.

It is an arithmetic number, because the mean of its divisors is an integer number (104820810).

Almost surely, 2^1131313203 is an apocalyptic number.

1131313203 is a deficient number, since it is larger than the sum of its proper divisors (545819757).

1131313203 is a wasteful number, since it uses less digits than its factorization.

1131313203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27843 (or 27837 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1131313203 is about 33634.9996729597. Note that the first 3 decimals coincide. The cubic root of 1131313203 is about 1041.9837638676.

Adding to 1131313203 its reverse (3023131311), we get a palindrome (4154444514).

It can be divided in two parts, 113 and 1313203, that added together give a square (1313316 = 1146²).

The spelling of 1131313203 in words is "one billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred three".