31103020323313 has 4 divisors (see below), whose sum is σ = 31116138427888. Its totient is φ = 31089902218740.

The previous prime is 31103020323253. The next prime is 31103020323359. The reversal of 31103020323313 is 31332302030113.

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-31103020323313 is a prime.

It is a super-3 number, since 3×31103020323313³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103020323383) 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, 6559048731 + ... + 6559053472.

It is an arithmetic number, because the mean of its divisors is an integer number (7779034606972).

Almost surely, 2^{31103020323313} is an apocalyptic number.

It is an amenable number.

31103020323313 is a deficient number, since it is larger than the sum of its proper divisors (13118104575).

31103020323313 is a wasteful number, since it uses less digits than its factorization.

31103020323313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13118104574.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31103020323313 its reverse (31332302030113), we get a palindrome (62435322353426).

The spelling of 31103020323313 in words is "thirty-one trillion, one hundred three billion, twenty million, three hundred twenty-three thousand, three hundred thirteen".