31493739513 has 8 divisors (see below), whose sum is σ = 43126562368. Its totient is φ = 20428371504.

The previous prime is 31493739499. The next prime is 31493739569. The reversal of 31493739513 is 31593739413.

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

It is not a de Polignac number, because 31493739513 - 2¹⁸ = 31493477369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31493729513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141863581 + ... + 141863802.

It is an arithmetic number, because the mean of its divisors is an integer number (5390820296).

Almost surely, 2^31493739513 is an apocalyptic number.

It is an amenable number.

31493739513 is a deficient number, since it is larger than the sum of its proper divisors (11632822855).

31493739513 is a wasteful number, since it uses less digits than its factorization.

31493739513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283727423.

The product of its digits is 918540, while the sum is 48.

The spelling of 31493739513 in words is "thirty-one billion, four hundred ninety-three million, seven hundred thirty-nine thousand, five hundred thirteen".