131216167331 has 4 divisors (see below), whose sum is σ = 131219234352. Its totient is φ = 131213100312.

The previous prime is 131216167307. The next prime is 131216167339. The reversal of 131216167331 is 133761612131.

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

It is a cyclic number.

It is not a de Polignac number, because 131216167331 - 2³⁰ = 130142425507 is a prime.

It is a super-2 number, since 2×131216167331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131216167291 and 131216167300.

It is not an unprimeable number, because it can be changed into a prime (131216167339) 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, 1468415 + ... + 1555208.

It is an arithmetic number, because the mean of its divisors is an integer number (32804808588).

Almost surely, 2^131216167331 is an apocalyptic number.

131216167331 is a deficient number, since it is larger than the sum of its proper divisors (3067021).

131216167331 is an equidigital number, since it uses as much as digits as its factorization.

131216167331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067020.

The product of its digits is 13608, while the sum is 35.

Adding to 131216167331 its reverse (133761612131), we get a palindrome (264977779462).

The spelling of 131216167331 in words is "one hundred thirty-one billion, two hundred sixteen million, one hundred sixty-seven thousand, three hundred thirty-one".