31300485505 has 4 divisors (see below), whose sum is σ = 37560582612. Its totient is φ = 25040388400.

The previous prime is 31300485473. The next prime is 31300485509. The reversal of 31300485505 is 50558400313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8630967409 + 22669518096 = 92903^2 + 150564^2 .

It is not a de Polignac number, because 31300485505 - 2⁵ = 31300485473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31300485509) 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, 3130048546 + ... + 3130048555.

It is an arithmetic number, because the mean of its divisors is an integer number (9390145653).

Almost surely, 2^31300485505 is an apocalyptic number.

It is an amenable number.

31300485505 is a deficient number, since it is larger than the sum of its proper divisors (6260097107).

31300485505 is an equidigital number, since it uses as much as digits as its factorization.

31300485505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260097106.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 31300485505 its reverse (50558400313), we get a palindrome (81858885818).

The spelling of 31300485505 in words is "thirty-one billion, three hundred million, four hundred eighty-five thousand, five hundred five".