31011313033213 has 4 divisors (see below), whose sum is σ = 31026522114720. Its totient is φ = 30996103951708.

The previous prime is 31011313033189. The next prime is 31011313033229. The reversal of 31011313033213 is 31233031311013.

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 a de Polignac number, because none of the positive numbers 2^k-31011313033213 is a prime.

It is a super-2 number, since 2×31011313033213² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011313033313) 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, 7604537695 + ... + 7604541772.

It is an arithmetic number, because the mean of its divisors is an integer number (7756630528680).

Almost surely, 2^{31011313033213} is an apocalyptic number.

It is an amenable number.

31011313033213 is a deficient number, since it is larger than the sum of its proper divisors (15209081507).

31011313033213 is a wasteful number, since it uses less digits than its factorization.

31011313033213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15209081506.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31011313033213 its reverse (31233031311013), we get a palindrome (62244344344226).

The spelling of 31011313033213 in words is "thirty-one trillion, eleven billion, three hundred thirteen million, thirty-three thousand, two hundred thirteen".