31443133131 has 12 divisors (see below), whose sum is σ = 45621529408. Its totient is φ = 20868087024.

The previous prime is 31443133121. The next prime is 31443133153. The reversal of 31443133131 is 13133134413.

31443133131 is a `hidden beast` number, since 31 + 4 + 4 + 313 + 313 + 1 = 666.

It is not a de Polignac number, because 31443133131 - 2¹⁰ = 31443132107 is a prime.

It is a super-2 number, since 2×31443133131² (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 = 31443133095 and 31443133104.

It is not an unprimeable number, because it can be changed into a prime (31443133121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7831360 + ... + 7835373.

Almost surely, 2^31443133131 is an apocalyptic number.

31443133131 is a deficient number, since it is larger than the sum of its proper divisors (14178396277).

31443133131 is a wasteful number, since it uses less digits than its factorization.

31443133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15666962 (or 15666959 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 31443133131 its reverse (13133134413), we get a palindrome (44576267544).

The spelling of 31443133131 in words is "thirty-one billion, four hundred forty-three million, one hundred thirty-three thousand, one hundred thirty-one".