131387243328 has 84 divisors (see below), whose sum is σ = 410833994688. Its totient is φ = 39814314240.

The previous prime is 131387243293. The next prime is 131387243347. The reversal of 131387243328 is 823342783131.

It is a happy number.

131387243328 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 87 + 243 + 328 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10361976 + ... + 10374647.

Almost surely, 2^131387243328 is an apocalyptic number.

131387243328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131387243328 is an abundant number, since it is smaller than the sum of its proper divisors (279446751360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131387243328 is a wasteful number, since it uses less digits than its factorization.

131387243328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20736652 (or 20736639 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 131387243328 in words is "one hundred thirty-one billion, three hundred eighty-seven million, two hundred forty-three thousand, three hundred twenty-eight".