31020331213 has 8 divisors (see below), whose sum is σ = 31370050880. Its totient is φ = 30671222400.

The previous prime is 31020331189. The next prime is 31020331253. The reversal of 31020331213 is 31213302013.

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 31020331213 - 2¹³ = 31020323021 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 (31020331253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50193 + ... + 254086.

It is an arithmetic number, because the mean of its divisors is an integer number (3921256360).

Almost surely, 2^31020331213 is an apocalyptic number.

It is an amenable number.

31020331213 is a deficient number, since it is larger than the sum of its proper divisors (349719667).

31020331213 is a wasteful number, since it uses less digits than its factorization.

31020331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305427.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31020331213 its reverse (31213302013), we get a palindrome (62233633226).

The spelling of 31020331213 in words is "thirty-one billion, twenty million, three hundred thirty-one thousand, two hundred thirteen".