31313021033 has 8 divisors (see below), whose sum is σ = 36188403840. Its totient is φ = 26538161760.

The previous prime is 31313020997. The next prime is 31313021057. The reversal of 31313021033 is 33012031313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31313021033 - 2¹⁶ = 31312955497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313020996 and 31313021014.

It is not an unprimeable number, because it can be changed into a prime (31313021833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25130213 + ... + 25131458.

It is an arithmetic number, because the mean of its divisors is an integer number (4523550480).

Almost surely, 2^31313021033 is an apocalyptic number.

It is an amenable number.

31313021033 is a deficient number, since it is larger than the sum of its proper divisors (4875382807).

31313021033 is an equidigital number, since it uses as much as digits as its factorization.

31313021033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50261767.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31313021033 its reverse (33012031313), we get a palindrome (64325052346).

The spelling of 31313021033 in words is "thirty-one billion, three hundred thirteen million, twenty-one thousand, thirty-three".