31830803813 has 4 divisors (see below), whose sum is σ = 32857603968. Its totient is φ = 30804003660.

The previous prime is 31830803803. The next prime is 31830803821.

It is a happy number.

31830803813 is nontrivially palindromic in base 10.

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-31830803813 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 (31830803803) 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, 513400031 + ... + 513400092.

It is an arithmetic number, because the mean of its divisors is an integer number (8214400992).

Almost surely, 2^31830803813 is an apocalyptic number.

It is an amenable number.

31830803813 is a deficient number, since it is larger than the sum of its proper divisors (1026800155).

31830803813 is a wasteful number, since it uses less digits than its factorization.

31830803813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026800154.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 31830803813 in words is "thirty-one billion, eight hundred thirty million, eight hundred three thousand, eight hundred thirteen".