3131030213 has 4 divisors (see below), whose sum is σ = 3142094208. Its totient is φ = 3119966220.

The previous prime is 3131030191. The next prime is 3131030257. The reversal of 3131030213 is 3120301313.

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-3131030213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131030191 and 3131030200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131030813) 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, 5531573 + ... + 5532138.

It is an arithmetic number, because the mean of its divisors is an integer number (785523552).

Almost surely, 2^3131030213 is an apocalyptic number.

It is an amenable number.

3131030213 is a deficient number, since it is larger than the sum of its proper divisors (11063995).

3131030213 is a wasteful number, since it uses less digits than its factorization.

3131030213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063994.

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

The square root of 3131030213 is about 55955.6093077361. The cubic root of 3131030213 is about 1462.9486621906.

Adding to 3131030213 its reverse (3120301313), we get a palindrome (6251331526).

The spelling of 3131030213 in words is "three billion, one hundred thirty-one million, thirty thousand, two hundred thirteen".