31030331133313 has 4 divisors (see below), whose sum is σ = 31076438609668. Its totient is φ = 30984223656960.

The previous prime is 31030331133301. The next prime is 31030331133317. The reversal of 31030331133313 is 31333113303013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8328603508624 + 22701727624689 = 2885932^2 + 4764633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31030331133313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31030331133317) 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, 23053737168 + ... + 23053738513.

It is an arithmetic number, because the mean of its divisors is an integer number (7769109652417).

Almost surely, 2^{31030331133313} is an apocalyptic number.

It is an amenable number.

31030331133313 is a deficient number, since it is larger than the sum of its proper divisors (46107476355).

31030331133313 is an equidigital number, since it uses as much as digits as its factorization.

31030331133313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46107476354.

The product of its (nonzero) digits is 6561, while the sum is 28.

Adding to 31030331133313 its reverse (31333113303013), we get a palindrome (62363444436326).

The spelling of 31030331133313 in words is "thirty-one trillion, thirty billion, three hundred thirty-one million, one hundred thirty-three thousand, three hundred thirteen".