131685372532221 has 8 divisors (see below), whose sum is σ = 176920805845344. Its totient is φ = 87120093786960.

The previous prime is 131685372532177. The next prime is 131685372532261. The reversal of 131685372532221 is 122235273586131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131685372532221 - 2¹⁸ = 131685372270077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131685372532261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167538641506 + ... + 167538642291.

It is an arithmetic number, because the mean of its divisors is an integer number (22115100730668).

Almost surely, 2^{131685372532221} is an apocalyptic number.

It is an amenable number.

131685372532221 is a deficient number, since it is larger than the sum of its proper divisors (45235433313123).

131685372532221 is a wasteful number, since it uses less digits than its factorization.

131685372532221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335077283931.

The product of its digits is 3628800, while the sum is 51.

The spelling of 131685372532221 in words is "one hundred thirty-one trillion, six hundred eighty-five billion, three hundred seventy-two million, five hundred thirty-two thousand, two hundred twenty-one".