31200143344 has 20 divisors (see below), whose sum is σ = 60458311224. Its totient is φ = 15597998528.

The previous prime is 31200143311. The next prime is 31200143353. The reversal of 31200143344 is 44334100213.

It is a super-2 number, since 2×31200143344² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1582 + ... + 249805.

Almost surely, 2^31200143344 is an apocalyptic number.

It is an amenable number.

31200143344 is a deficient number, since it is larger than the sum of its proper divisors (29258167880).

31200143344 is a wasteful number, since it uses less digits than its factorization.

31200143344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259152 (or 259146 counting only the distinct ones).

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

Adding to 31200143344 its reverse (44334100213), we get a palindrome (75534243557).

The spelling of 31200143344 in words is "thirty-one billion, two hundred million, one hundred forty-three thousand, three hundred forty-four".