31513440545 has 8 divisors (see below), whose sum is σ = 38620727424. Its totient is φ = 24674353264.

The previous prime is 31513440523. The next prime is 31513440551. The reversal of 31513440545 is 54504431513.

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 31513440545 - 2¹⁰ = 31513439521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67049639 + ... + 67050108.

It is an arithmetic number, because the mean of its divisors is an integer number (4827590928).

Almost surely, 2^31513440545 is an apocalyptic number.

It is an amenable number.

31513440545 is a deficient number, since it is larger than the sum of its proper divisors (7107286879).

31513440545 is a wasteful number, since it uses less digits than its factorization.

31513440545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134099799.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 31513440545 in words is "thirty-one billion, five hundred thirteen million, four hundred forty thousand, five hundred forty-five".