31320224442 has 24 divisors (see below), whose sum is σ = 73080524244. Its totient is φ = 9636992064.

The previous prime is 31320224417. The next prime is 31320224471. The reversal of 31320224442 is 24442202313.

31320224442 is a `hidden beast` number, since 3 + 13 + 202 + 2 + 4 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27059921001 + 4260303441 = 164499^2 + 65271^2 .

It is a super-2 number, since 2×31320224442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 66923323 + ... + 66923790.

Almost surely, 2^31320224442 is an apocalyptic number.

31320224442 is an abundant number, since it is smaller than the sum of its proper divisors (41760299802).

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

31320224442 is a wasteful number, since it uses less digits than its factorization.

31320224442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133847134 (or 133847131 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 31320224442 its reverse (24442202313), we get a palindrome (55762426755).

The spelling of 31320224442 in words is "thirty-one billion, three hundred twenty million, two hundred twenty-four thousand, four hundred forty-two".