31504505305 has 16 divisors (see below), whose sum is σ = 46529731584. Its totient is φ = 19941312960.

The previous prime is 31504505297. The next prime is 31504505327. The reversal of 31504505305 is 50350540513.

It is not a de Polignac number, because 31504505305 - 2³ = 31504505297 is a prime.

It is an unprimeable number.

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, 34619881 + ... + 34620790.

It is an arithmetic number, because the mean of its divisors is an integer number (2908108224).

Almost surely, 2^31504505305 is an apocalyptic number.

31504505305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31504505305 is a deficient number, since it is larger than the sum of its proper divisors (15025226279).

31504505305 is a wasteful number, since it uses less digits than its factorization.

31504505305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69240696.

The product of its (nonzero) digits is 22500, while the sum is 31.

The spelling of 31504505305 in words is "thirty-one billion, five hundred four million, five hundred five thousand, three hundred five".