131689042381 has 4 divisors (see below), whose sum is σ = 141818968732. Its totient is φ = 121559116032.

The previous prime is 131689042379. The next prime is 131689042391. The reversal of 131689042381 is 183240986131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28449568900 + 103239473481 = 168670^2 + 321309^2 .

It is a cyclic number.

It is not a de Polignac number, because 131689042381 - 2¹ = 131689042379 is a prime.

It is a super-2 number, since 2×131689042381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131689042391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5064963156 + ... + 5064963181.

It is an arithmetic number, because the mean of its divisors is an integer number (35454742183).

Almost surely, 2^131689042381 is an apocalyptic number.

It is an amenable number.

131689042381 is a deficient number, since it is larger than the sum of its proper divisors (10129926351).

131689042381 is a wasteful number, since it uses less digits than its factorization.

131689042381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129926350.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 131689042381 in words is "one hundred thirty-one billion, six hundred eighty-nine million, forty-two thousand, three hundred eighty-one".