331131231320313 has 4 divisors (see below), whose sum is σ = 441508308427088. Its totient is φ = 220754154213540.

The previous prime is 331131231320303. The next prime is 331131231320321. The reversal of 331131231320313 is 313023132131133.

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 331131231320313 - 2²² = 331131227126009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331131231320303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55188538553383 + ... + 55188538553388.

It is an arithmetic number, because the mean of its divisors is an integer number (110377077106772).

Almost surely, 2^{331131231320313} is an apocalyptic number.

It is an amenable number.

331131231320313 is a deficient number, since it is larger than the sum of its proper divisors (110377077106775).

331131231320313 is a wasteful number, since it uses less digits than its factorization.

331131231320313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110377077106774.

The product of its (nonzero) digits is 8748, while the sum is 30.

Adding to 331131231320313 its reverse (313023132131133), we get a palindrome (644154363451446).

The spelling of 331131231320313 in words is "three hundred thirty-one trillion, one hundred thirty-one billion, two hundred thirty-one million, three hundred twenty thousand, three hundred thirteen".