31421323332144 has 60 divisors (see below), whose sum is σ = 88021191897496. Its totient is φ = 10463635213056.

The previous prime is 31421323332143. The next prime is 31421323332149. The reversal of 31421323332144 is 44123332312413.

31421323332144 is a `hidden beast` number, since 3 + 1 + 4 + 2 + 1 + 323 + 3 + 321 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31421323332099 and 31421323332108.

It is not an unprimeable number, because it can be changed into a prime (31421323332143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105467722 + ... + 105765225.

Almost surely, 2^{31421323332144} is an apocalyptic number.

It is an amenable number.

31421323332144 is an abundant number, since it is smaller than the sum of its proper divisors (56599868565352).

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

31421323332144 is a wasteful number, since it uses less digits than its factorization.

31421323332144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211233994 (or 211233985 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

Adding to 31421323332144 its reverse (44123332312413), we get a palindrome (75544655644557).

The spelling of 31421323332144 in words is "thirty-one trillion, four hundred twenty-one billion, three hundred twenty-three million, three hundred thirty-two thousand, one hundred forty-four".