31504705345 has 8 divisors (see below), whose sum is σ = 37869403176. Its totient is φ = 25161259776.

The previous prime is 31504705343. The next prime is 31504705367. The reversal of 31504705345 is 54350740513.

It can be written as a sum of positive squares in 4 ways, for example, as 4081676544 + 27423028801 = 63888^2 + 165599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31504705345 - 2¹ = 31504705343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31504705343) 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 7 ways as a sum of consecutive naturals, for example, 5309802 + ... + 5315731.

It is an arithmetic number, because the mean of its divisors is an integer number (4733675397).

Almost surely, 2^31504705345 is an apocalyptic number.

It is an amenable number.

31504705345 is a deficient number, since it is larger than the sum of its proper divisors (6364697831).

31504705345 is a wasteful number, since it uses less digits than its factorization.

31504705345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626131.

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 31504705345 in words is "thirty-one billion, five hundred four million, seven hundred five thousand, three hundred forty-five".