31224444133 has 4 divisors (see below), whose sum is σ = 31226967180. Its totient is φ = 31221921088.

The previous prime is 31224444107. The next prime is 31224444151. The reversal of 31224444133 is 33144442213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5213850849 + 26010593284 = 72207^2 + 161278^2 .

It is a cyclic number.

It is not a de Polignac number, because 31224444133 - 2¹³ = 31224435941 is a prime.

It is a super-2 number, since 2×31224444133² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31224444095 and 31224444104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224444533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1242868 + ... + 1267741.

It is an arithmetic number, because the mean of its divisors is an integer number (7806741795).

Almost surely, 2^31224444133 is an apocalyptic number.

It is an amenable number.

31224444133 is a deficient number, since it is larger than the sum of its proper divisors (2523047).

31224444133 is a wasteful number, since it uses less digits than its factorization.

31224444133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523046.

The product of its digits is 27648, while the sum is 31.

Adding to 31224444133 its reverse (33144442213), we get a palindrome (64368886346).

The spelling of 31224444133 in words is "thirty-one billion, two hundred twenty-four million, four hundred forty-four thousand, one hundred thirty-three".