131643504243 has 12 divisors (see below), whose sum is σ = 196285655488. Its totient is φ = 84931292880.

The previous prime is 131643504211. The next prime is 131643504247. The reversal of 131643504243 is 342405346131.

131643504243 is a `hidden beast` number, since 1 + 3 + 1 + 64 + 350 + 4 + 243 = 666.

It is not a de Polignac number, because 131643504243 - 2⁵ = 131643504211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131643504198 and 131643504207.

It is not an unprimeable number, because it can be changed into a prime (131643504247) 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, 235919980 + ... + 235920537.

Almost surely, 2^131643504243 is an apocalyptic number.

131643504243 is a deficient number, since it is larger than the sum of its proper divisors (64642151245).

131643504243 is a wasteful number, since it uses less digits than its factorization.

131643504243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471840554 (or 471840551 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 131643504243 in words is "one hundred thirty-one billion, six hundred forty-three million, five hundred four thousand, two hundred forty-three".