131581752385 has 8 divisors (see below), whose sum is σ = 157900069800. Its totient is φ = 105264090624.

The previous prime is 131581752331. The next prime is 131581752409. The reversal of 131581752385 is 583257185131.

It can be written as a sum of positive squares in 4 ways, for example, as 9271378944 + 122310373441 = 96288^2 + 349729^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131581752385 - 2¹⁵ = 131581719617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608559 + ... + 795931.

It is an arithmetic number, because the mean of its divisors is an integer number (19737508725).

Almost surely, 2^131581752385 is an apocalyptic number.

It is an amenable number.

131581752385 is a deficient number, since it is larger than the sum of its proper divisors (26318317415).

131581752385 is a wasteful number, since it uses less digits than its factorization.

131581752385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327827.

The product of its digits is 1008000, while the sum is 49.

The spelling of 131581752385 in words is "one hundred thirty-one billion, five hundred eighty-one million, seven hundred fifty-two thousand, three hundred eighty-five".