31003222013 has 4 divisors (see below), whose sum is σ = 32634970560. Its totient is φ = 29371473468.

The previous prime is 31003221973. The next prime is 31003222039. The reversal of 31003222013 is 31022230013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31022230013 = 37 ⋅838438649.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31003222013 is a prime.

It is a super-2 number, since 2×31003222013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31003221982 and 31003222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003122013) 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, 815874245 + ... + 815874282.

It is an arithmetic number, because the mean of its divisors is an integer number (8158742640).

Almost surely, 2^31003222013 is an apocalyptic number.

It is an amenable number.

31003222013 is a deficient number, since it is larger than the sum of its proper divisors (1631748547).

31003222013 is a wasteful number, since it uses less digits than its factorization.

31003222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631748546.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31003222013 its reverse (31022230013), we get a palindrome (62025452026).

The spelling of 31003222013 in words is "thirty-one billion, three million, two hundred twenty-two thousand, thirteen".