31440213441 has 72 divisors (see below), whose sum is σ = 56961725184. Its totient is φ = 16563476160.

The previous prime is 31440213421. The next prime is 31440213449. The reversal of 31440213441 is 14431204413.

31440213441 is a `hidden beast` number, since 3 + 1 + 4 + 4 + 0 + 213 + 441 = 666.

It is not a de Polignac number, because 31440213441 - 2¹¹ = 31440211393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31440213449) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5426256 + ... + 5432046.

It is an arithmetic number, because the mean of its divisors is an integer number (791135072).

Almost surely, 2^31440213441 is an apocalyptic number.

It is an amenable number.

31440213441 is a deficient number, since it is larger than the sum of its proper divisors (25521511743).

31440213441 is a wasteful number, since it uses less digits than its factorization.

31440213441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771 (or 6761 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 31440213441 its reverse (14431204413), we get a palindrome (45871417854).

The spelling of 31440213441 in words is "thirty-one billion, four hundred forty million, two hundred thirteen thousand, four hundred forty-one".