131432165215859 has 4 divisors (see below), whose sum is σ = 139163469052104. Its totient is φ = 123700861379616.

The previous prime is 131432165215853. The next prime is 131432165215889. The reversal of 131432165215859 is 958512561234131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131432165215859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131432165215853) 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, 3865651918097 + ... + 3865651918130.

It is an arithmetic number, because the mean of its divisors is an integer number (34790867263026).

Almost surely, 2^{131432165215859} is an apocalyptic number.

131432165215859 is a deficient number, since it is larger than the sum of its proper divisors (7731303836245).

131432165215859 is an equidigital number, since it uses as much as digits as its factorization.

131432165215859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731303836244.

The product of its digits is 7776000, while the sum is 56.

The spelling of 131432165215859 in words is "one hundred thirty-one trillion, four hundred thirty-two billion, one hundred sixty-five million, two hundred fifteen thousand, eight hundred fifty-nine".