2131313 has 4 divisors (see below), whose sum is σ = 2134260. Its totient is φ = 2128368.

The previous prime is 2131291. The next prime is 2131319. The reversal of 2131313 is 3131312.

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 1270129 + 861184 = 1127^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131313 - 2¹⁸ = 1869169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131319) 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, 443 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (533565).

2^2131313 is an apocalyptic number.

It is an amenable number.

2131313 is a deficient number, since it is larger than the sum of its proper divisors (2947).

2131313 is a wasteful number, since it uses less digits than its factorization.

2131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946.

The product of its digits is 54, while the sum is 14.

The square root of 2131313 is about 1459.9017090202. The cubic root of 2131313 is about 128.6912673959.

Adding to 2131313 its reverse (3131312), we get a palindrome (5262625).

Subtracting 2131313 from its reverse (3131312), we obtain a palindrome (999999).

The spelling of 2131313 in words is "two million, one hundred thirty-one thousand, three hundred thirteen".