31010330213 has 4 divisors (see below), whose sum is σ = 31284758028. Its totient is φ = 30735902400.

The previous prime is 31010330189. The next prime is 31010330227. The reversal of 31010330213 is 31203301013.

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 1294776289 + 29715553924 = 35983^2 + 172382^2 .

It is a cyclic number.

It is not a de Polignac number, because 31010330213 - 2⁶ = 31010330149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31010330191 and 31010330200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31010330243) 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 3 ways as a sum of consecutive naturals, for example, 137213738 + ... + 137213963.

It is an arithmetic number, because the mean of its divisors is an integer number (7821189507).

Almost surely, 2^31010330213 is an apocalyptic number.

It is an amenable number.

31010330213 is a deficient number, since it is larger than the sum of its proper divisors (274427815).

31010330213 is a wasteful number, since it uses less digits than its factorization.

31010330213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274427814.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31010330213 its reverse (31203301013), we get a palindrome (62213631226).

The spelling of 31010330213 in words is "thirty-one billion, ten million, three hundred thirty thousand, two hundred thirteen".