31440213313 has 8 divisors (see below), whose sum is σ = 31998914240. Its totient is φ = 30882908880.

The previous prime is 31440213281. The next prime is 31440213317. The reversal of 31440213313 is 31331204413.

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 31440213313 - 2⁵ = 31440213281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31440213317) 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, 303645 + ... + 393802.

It is an arithmetic number, because the mean of its divisors is an integer number (3999864280).

Almost surely, 2^31440213313 is an apocalyptic number.

It is an amenable number.

31440213313 is a deficient number, since it is larger than the sum of its proper divisors (558700927).

31440213313 is an equidigital number, since it uses as much as digits as its factorization.

31440213313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698247.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31440213313 its reverse (31331204413), we get a palindrome (62771417726).

The spelling of 31440213313 in words is "thirty-one billion, four hundred forty million, two hundred thirteen thousand, three hundred thirteen".