31440211113 has 8 divisors (see below), whose sum is σ = 41925873568. Its totient is φ = 20957344704.

The previous prime is 31440211093. The next prime is 31440211133. The reversal of 31440211113 is 31111204413.

It is an interprime number because it is at equal distance from previous prime (31440211093) and next prime (31440211133).

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

It is not a de Polignac number, because 31440211113 - 2¹⁶ = 31440145577 is a prime.

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 31440211113.

It is not an unprimeable number, because it can be changed into a prime (31440211133) 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, 672631 + ... + 717852.

It is an arithmetic number, because the mean of its divisors is an integer number (5240734196).

Almost surely, 2^31440211113 is an apocalyptic number.

It is an amenable number.

31440211113 is a deficient number, since it is larger than the sum of its proper divisors (10485662455).

31440211113 is a wasteful number, since it uses less digits than its factorization.

31440211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398023.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31440211113 its reverse (31111204413), we get a palindrome (62551415526).

The spelling of 31440211113 in words is "thirty-one billion, four hundred forty million, two hundred eleven thousand, one hundred thirteen".