31030203013 has 4 divisors (see below), whose sum is σ = 31030990380. Its totient is φ = 31029415648.

The previous prime is 31030203011. The next prime is 31030203019.

31030203013 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 20921308164 + 10108894849 = 144642^2 + 100543^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030203013 - 2¹ = 31030203011 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 (31030203011) 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, 331270 + ... + 414487.

It is an arithmetic number, because the mean of its divisors is an integer number (7757747595).

Almost surely, 2^31030203013 is an apocalyptic number.

It is an amenable number.

31030203013 is a deficient number, since it is larger than the sum of its proper divisors (787367).

31030203013 is an equidigital number, since it uses as much as digits as its factorization.

31030203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787366.

The product of its (nonzero) digits is 162, while the sum is 16.

The spelling of 31030203013 in words is "thirty-one billion, thirty million, two hundred three thousand, thirteen".