31230320113 has 4 divisors (see below), whose sum is σ = 31233040960. Its totient is φ = 31227599268.

The previous prime is 31230320057. The next prime is 31230320131. The reversal of 31230320113 is 31102303213.

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 31230320113 - 2²⁹ = 30693449201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31230320153) 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, 1343133 + ... + 1366186.

It is an arithmetic number, because the mean of its divisors is an integer number (7808260240).

Almost surely, 2^31230320113 is an apocalyptic number.

It is an amenable number.

31230320113 is a deficient number, since it is larger than the sum of its proper divisors (2720847).

31230320113 is a wasteful number, since it uses less digits than its factorization.

31230320113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720846.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31230320113 its reverse (31102303213), we get a palindrome (62332623326).

The spelling of 31230320113 in words is "thirty-one billion, two hundred thirty million, three hundred twenty thousand, one hundred thirteen".