31305306305 has 48 divisors (see below), whose sum is σ = 46671657984. Its totient is φ = 19630045440.

The previous prime is 31305306301. The next prime is 31305306313. The reversal of 31305306305 is 50360350313.

It is not a de Polignac number, because 31305306305 - 2² = 31305306301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31305306301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5402960 + ... + 5408750.

It is an arithmetic number, because the mean of its divisors is an integer number (972326208).

Almost surely, 2^31305306305 is an apocalyptic number.

31305306305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31305306305 is a deficient number, since it is larger than the sum of its proper divisors (15366351679).

31305306305 is a wasteful number, since it uses less digits than its factorization.

31305306305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034 (or 5925 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 29.

Adding to 31305306305 its reverse (50360350313), we get a palindrome (81665656618).

The spelling of 31305306305 in words is "thirty-one billion, three hundred five million, three hundred six thousand, three hundred five".