2531321113 has 4 divisors (see below), whose sum is σ = 2664548560. Its totient is φ = 2398093668.

The previous prime is 2531321101. The next prime is 2531321153. The reversal of 2531321113 is 3111231352.

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 a cyclic number.

It is not a de Polignac number, because 2531321113 - 2¹³ = 2531312921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531321153) 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, 66613695 + ... + 66613732.

It is an arithmetic number, because the mean of its divisors is an integer number (666137140).

Almost surely, 2^2531321113 is an apocalyptic number.

It is an amenable number.

2531321113 is a deficient number, since it is larger than the sum of its proper divisors (133227447).

2531321113 is a wasteful number, since it uses less digits than its factorization.

2531321113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133227446.

The product of its digits is 540, while the sum is 22.

The square root of 2531321113 is about 50312.2362154576. The cubic root of 2531321113 is about 1362.8532070623.

Adding to 2531321113 its reverse (3111231352), we get a palindrome (5642552465).

The spelling of 2531321113 in words is "two billion, five hundred thirty-one million, three hundred twenty-one thousand, one hundred thirteen".