31030330020013 has 4 divisors (see below), whose sum is σ = 32855643550620. Its totient is φ = 29205016489408.

The previous prime is 31030330020007. The next prime is 31030330020043. The reversal of 31030330020013 is 31002003303013.

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 25751189640969 + 5279140379044 = 5074563^2 + 2297638^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030330020013 - 2¹⁷ = 31030329888941 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 (31030330020043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912656765278 + ... + 912656765311.

It is an arithmetic number, because the mean of its divisors is an integer number (8213910887655).

Almost surely, 2^{31030330020013} is an apocalyptic number.

It is an amenable number.

31030330020013 is a deficient number, since it is larger than the sum of its proper divisors (1825313530607).

31030330020013 is a wasteful number, since it uses less digits than its factorization.

31030330020013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825313530606.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 31030330020013 its reverse (31002003303013), we get a palindrome (62032333323026).

The spelling of 31030330020013 in words is "thirty-one trillion, thirty billion, three hundred thirty million, twenty thousand, thirteen".