31312040513 has 8 divisors (see below), whose sum is σ = 34808422656. Its totient is φ = 27971053200.

The previous prime is 31312040491. The next prime is 31312040521. The reversal of 31312040513 is 31504021313.

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 31312040513 - 2³⁰ = 30238298689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31312042513) by changing a digit.

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, 38848283 + ... + 38849088.

It is an arithmetic number, because the mean of its divisors is an integer number (4351052832).

Almost surely, 2^31312040513 is an apocalyptic number.

It is an amenable number.

31312040513 is a deficient number, since it is larger than the sum of its proper divisors (3496382143).

31312040513 is a wasteful number, since it uses less digits than its factorization.

31312040513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77697415.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 31312040513 its reverse (31504021313), we get a palindrome (62816061826).

The spelling of 31312040513 in words is "thirty-one billion, three hundred twelve million, forty thousand, five hundred thirteen".