31020300013 has 8 divisors (see below), whose sum is σ = 31196894456. Its totient is φ = 30843763200.

The previous prime is 31020299971. The next prime is 31020300043. The reversal of 31020300013 is 31000302013.

It can be written as a sum of positive squares in 4 ways, for example, as 1518115369 + 29502184644 = 38963^2 + 171762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31020300013 - 2¹³ = 31020291821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020299966 and 31020300002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020300043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1532245 + ... + 1552357.

It is an arithmetic number, because the mean of its divisors is an integer number (3899611807).

Almost surely, 2^31020300013 is an apocalyptic number.

It is an amenable number.

31020300013 is a deficient number, since it is larger than the sum of its proper divisors (176594443).

31020300013 is a wasteful number, since it uses less digits than its factorization.

31020300013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28815.

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31020300013 its reverse (31000302013), we get a palindrome (62020602026).

The spelling of 31020300013 in words is "thirty-one billion, twenty million, three hundred thousand, thirteen".