31305235205 has 16 divisors (see below), whose sum is σ = 38060457984. Its totient is φ = 24716805120.

The previous prime is 31305235189. The next prime is 31305235217. The reversal of 31305235205 is 50253250313.

It is not a de Polignac number, because 31305235205 - 2⁴ = 31305235189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7772 + ... + 250341.

It is an arithmetic number, because the mean of its divisors is an integer number (2378778624).

Almost surely, 2^31305235205 is an apocalyptic number.

It is an amenable number.

31305235205 is a deficient number, since it is larger than the sum of its proper divisors (6755222779).

31305235205 is a wasteful number, since it uses less digits than its factorization.

31305235205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258436.

The product of its (nonzero) digits is 13500, while the sum is 29.

Adding to 31305235205 its reverse (50253250313), we get a palindrome (81558485518).

The spelling of 31305235205 in words is "thirty-one billion, three hundred five million, two hundred thirty-five thousand, two hundred five".