31043133320 has 16 divisors (see below), whose sum is σ = 69847050060. Its totient is φ = 12417253312.

The previous prime is 31043133301. The next prime is 31043133323. The reversal of 31043133320 is 2333134013.

It can be written as a sum of positive squares in 2 ways, for example, as 29471962276 + 1571171044 = 171674^2 + 39638^2 .

It is a super-2 number, since 2×31043133320² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31043133323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388039127 + ... + 388039206.

Almost surely, 2^31043133320 is an apocalyptic number.

It is an amenable number.

31043133320 is an abundant number, since it is smaller than the sum of its proper divisors (38803916740).

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

31043133320 is a wasteful number, since it uses less digits than its factorization.

31043133320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776078344 (or 776078340 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31043133320 its reverse (2333134013), we get a palindrome (33376267333).

The spelling of 31043133320 in words is "thirty-one billion, forty-three million, one hundred thirty-three thousand, three hundred twenty".