31032135505 has 16 divisors (see below), whose sum is σ = 43708584960. Its totient is φ = 20704064832.

The previous prime is 31032135503. The next prime is 31032135517. The reversal of 31032135505 is 50553123013.

It is a cyclic number.

It is not a de Polignac number, because 31032135505 - 2¹ = 31032135503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31032135503) 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 15 ways as a sum of consecutive naturals, for example, 11980225 + ... + 11982814.

It is an arithmetic number, because the mean of its divisors is an integer number (2731786560).

Almost surely, 2^31032135505 is an apocalyptic number.

31032135505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31032135505 is a deficient number, since it is larger than the sum of its proper divisors (12676449455).

31032135505 is a wasteful number, since it uses less digits than its factorization.

31032135505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23963088.

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 31032135505 its reverse (50553123013), we get a palindrome (81585258518).

The spelling of 31032135505 in words is "thirty-one billion, thirty-two million, one hundred thirty-five thousand, five hundred five".