31003100213 has 4 divisors (see below), whose sum is σ = 31465833120. Its totient is φ = 30540367308.

The previous prime is 31003100203. The next prime is 31003100221. The reversal of 31003100213 is 31200130013.

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 not a de Polignac number, because 31003100213 - 2²⁰ = 31002051637 is a prime.

It is a super-2 number, since 2×31003100213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003100203) 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, 231366353 + ... + 231366486.

It is an arithmetic number, because the mean of its divisors is an integer number (7866458280).

Almost surely, 2^31003100213 is an apocalyptic number.

It is an amenable number.

31003100213 is a deficient number, since it is larger than the sum of its proper divisors (462732907).

31003100213 is an equidigital number, since it uses as much as digits as its factorization.

31003100213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462732906.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31003100213 its reverse (31200130013), we get a palindrome (62203230226).

The spelling of 31003100213 in words is "thirty-one billion, three million, one hundred thousand, two hundred thirteen".