2531305313 has 4 divisors (see below), whose sum is σ = 2554962480. Its totient is φ = 2507648148.

The previous prime is 2531305291. The next prime is 2531305351. The reversal of 2531305313 is 3135031352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2531305313 - 2⁸ = 2531305057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531305613) 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, 11828423 + ... + 11828636.

It is an arithmetic number, because the mean of its divisors is an integer number (638740620).

Almost surely, 2^2531305313 is an apocalyptic number.

It is an amenable number.

2531305313 is a deficient number, since it is larger than the sum of its proper divisors (23657167).

2531305313 is a wasteful number, since it uses less digits than its factorization.

2531305313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23657166.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 2531305313 is about 50312.0791957558. The cubic root of 2531305313 is about 1362.8503715040.

Adding to 2531305313 its reverse (3135031352), we get a palindrome (5666336665).

The spelling of 2531305313 in words is "two billion, five hundred thirty-one million, three hundred five thousand, three hundred thirteen".