131203313 has 4 divisors (see below), whose sum is σ = 131226228. Its totient is φ = 131180400.

The previous prime is 131203309. The next prime is 131203333. The reversal of 131203313 is 313302131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47169424 + 84033889 = 6868^2 + 9167^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203313 - 2² = 131203309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131203291 and 131203300.

It is not an unprimeable number, because it can be changed into a prime (131203333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363 + ... + 17063.

It is an arithmetic number, because the mean of its divisors is an integer number (32806557).

Almost surely, 2^131203313 is an apocalyptic number.

It is an amenable number.

131203313 is a deficient number, since it is larger than the sum of its proper divisors (22915).

131203313 is a wasteful number, since it uses less digits than its factorization.

131203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22914.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131203313 is about 11454.4014684313. The cubic root of 131203313 is about 508.1379141226.

Adding to 131203313 its reverse (313302131), we get a palindrome (444505444).

The spelling of 131203313 in words is "one hundred thirty-one million, two hundred three thousand, three hundred thirteen".