31140003313 has 4 divisors (see below), whose sum is σ = 31140888228. Its totient is φ = 31139118400.

The previous prime is 31140003299. The next prime is 31140003337. The reversal of 31140003313 is 31330004113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31330004113 = 1783 ⋅17571511.

It can be written as a sum of positive squares in 2 ways, for example, as 26118438544 + 5021564769 = 161612^2 + 70863^2 .

It is a cyclic number.

It is not a de Polignac number, because 31140003313 - 2¹³ = 31139995121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31140003373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387388 + ... + 460813.

It is an arithmetic number, because the mean of its divisors is an integer number (7785222057).

Almost surely, 2^31140003313 is an apocalyptic number.

It is an amenable number.

31140003313 is a deficient number, since it is larger than the sum of its proper divisors (884915).

31140003313 is an equidigital number, since it uses as much as digits as its factorization.

31140003313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884914.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31140003313 its reverse (31330004113), we get a palindrome (62470007426).

The spelling of 31140003313 in words is "thirty-one billion, one hundred forty million, three thousand, three hundred thirteen".