31443413144 has 64 divisors (see below), whose sum is σ = 69438932640. Its totient is φ = 13159618560.

The previous prime is 31443413117. The next prime is 31443413159. The reversal of 31443413144 is 44131434413.

It is a self number, because there is not a number n which added to its sum of digits gives 31443413144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419552 + ... + 488784.

Almost surely, 2^31443413144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31443413144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34719466320).

31443413144 is an abundant number, since it is smaller than the sum of its proper divisors (37995519496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31443413144 is a wasteful number, since it uses less digits than its factorization.

31443413144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69660 (or 69656 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 31443413144 its reverse (44131434413), we get a palindrome (75574847557).

The spelling of 31443413144 in words is "thirty-one billion, four hundred forty-three million, four hundred thirteen thousand, one hundred forty-four".