31330042144 has 24 divisors (see below), whose sum is σ = 61728953580. Its totient is φ = 15652847616.

The previous prime is 31330042141. The next prime is 31330042171. The reversal of 31330042144 is 44124003313.

It can be written as a sum of positive squares in 2 ways, for example, as 31324752144 + 5290000 = 176988^2 + 2300^2 .

It is a super-2 number, since 2×31330042144² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31330042141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338529 + ... + 421024.

Almost surely, 2^31330042144 is an apocalyptic number.

It is an amenable number.

31330042144 is a deficient number, since it is larger than the sum of its proper divisors (30398911436).

31330042144 is a wasteful number, since it uses less digits than its factorization.

31330042144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760852 (or 760844 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31330042144 its reverse (44124003313), we get a palindrome (75454045457).

The spelling of 31330042144 in words is "thirty-one billion, three hundred thirty million, forty-two thousand, one hundred forty-four".