143404131231 has 12 divisors (see below), whose sum is σ = 207142871208. Its totient is φ = 95601106224.

The previous prime is 143404131229. The next prime is 143404131239. The reversal of 143404131231 is 132131404341.

143404131231 is a `hidden beast` number, since 1 + 4 + 340 + 4 + 1 + 312 + 3 + 1 = 666.

It is not a de Polignac number, because 143404131231 - 2¹ = 143404131229 is a prime.

It is a super-2 number, since 2×143404131231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143404131195 and 143404131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143404131239) 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, 653481 + ... + 844893.

It is an arithmetic number, because the mean of its divisors is an integer number (17261905934).

Almost surely, 2^143404131231 is an apocalyptic number.

143404131231 is a deficient number, since it is larger than the sum of its proper divisors (63738739977).

143404131231 is a wasteful number, since it uses less digits than its factorization.

143404131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274662 (or 274659 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 143404131231 its reverse (132131404341), we get a palindrome (275535535572).

The spelling of 143404131231 in words is "one hundred forty-three billion, four hundred four million, one hundred thirty-one thousand, two hundred thirty-one".