31306536105072 has 20 divisors (see below), whose sum is σ = 80875218271560. Its totient is φ = 10435512035008.

The previous prime is 31306536105017. The next prime is 31306536105073. The reversal of 31306536105072 is 27050163560313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31306536105073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326109751047 + ... + 326109751142.

It is an arithmetic number, because the mean of its divisors is an integer number (4043760913578).

Almost surely, 2^{31306536105072} is an apocalyptic number.

It is an amenable number.

31306536105072 is an abundant number, since it is smaller than the sum of its proper divisors (49568682166488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31306536105072 is a wasteful number, since it uses less digits than its factorization.

31306536105072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652219502200 (or 652219502194 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 42.

Adding to 31306536105072 its reverse (27050163560313), we get a palindrome (58356699665385).

The spelling of 31306536105072 in words is "thirty-one trillion, three hundred six billion, five hundred thirty-six million, one hundred five thousand, seventy-two".