131216051 has 2 divisors, whose sum is σ = 131216052. Its totient is φ = 131216050.

The previous prime is 131216021. The next prime is 131216117. The reversal of 131216051 is 150612131.

It is a weak prime.

It is an emirp because it is prime and its reverse (150612131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131216051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131216021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65608025 + 65608026.

It is an arithmetic number, because the mean of its divisors is an integer number (65608026).

Almost surely, 2^131216051 is an apocalyptic number.

131216051 is a deficient number, since it is larger than the sum of its proper divisors (1).

131216051 is an equidigital number, since it uses as much as digits as its factorization.

131216051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 131216051 is about 11454.9574857352. The cubic root of 131216051 is about 508.1543579434.

Adding to 131216051 its reverse (150612131), we get a palindrome (281828182).

The spelling of 131216051 in words is "one hundred thirty-one million, two hundred sixteen thousand, fifty-one".