31703405513 has 8 divisors (see below), whose sum is σ = 34974864456. Its totient is φ = 28550908800.

The previous prime is 31703405509. The next prime is 31703405527. The reversal of 31703405513 is 31550430713.

It can be written as a sum of positive squares in 4 ways, for example, as 5855769529 + 25847635984 = 76523^2 + 160772^2 .

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 31703405513 - 2² = 31703405509 is a prime.

It is a super-2 number, since 2×31703405513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31703405513.

It is not an unprimeable number, because it can be changed into a prime (31703435513) 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, 29739998 + ... + 29741063.

It is an arithmetic number, because the mean of its divisors is an integer number (4371858057).

Almost surely, 2^31703405513 is an apocalyptic number.

It is an amenable number.

31703405513 is a deficient number, since it is larger than the sum of its proper divisors (3271458943).

31703405513 is a wasteful number, since it uses less digits than its factorization.

31703405513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59481115.

The product of its (nonzero) digits is 18900, while the sum is 32.

The spelling of 31703405513 in words is "thirty-one billion, seven hundred three million, four hundred five thousand, five hundred thirteen".