31230403213 has 4 divisors (see below), whose sum is σ = 31539615228. Its totient is φ = 30921191200.

The previous prime is 31230403199. The next prime is 31230403229.

31230403213 is nontrivially palindromic in base 10.

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 28600559689 + 2629843524 = 169117^2 + 51282^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230403213 - 2⁹ = 31230402701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230400213) 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, 154605856 + ... + 154606057.

It is an arithmetic number, because the mean of its divisors is an integer number (7884903807).

Almost surely, 2^31230403213 is an apocalyptic number.

It is an amenable number.

31230403213 is a deficient number, since it is larger than the sum of its proper divisors (309212015).

31230403213 is a wasteful number, since it uses less digits than its factorization.

31230403213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309212014.

The product of its (nonzero) digits is 1296, while the sum is 22.

The spelling of 31230403213 in words is "thirty-one billion, two hundred thirty million, four hundred three thousand, two hundred thirteen".