131216751 has 12 divisors (see below), whose sum is σ = 189680400. Its totient is φ = 87410880.

The previous prime is 131216741. The next prime is 131216759. The reversal of 131216751 is 157612131.

It is not a de Polignac number, because 131216751 - 2⁵ = 131216719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131216759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8775 + ... + 18423.

It is an arithmetic number, because the mean of its divisors is an integer number (15806700).

Almost surely, 2^131216751 is an apocalyptic number.

131216751 is a deficient number, since it is larger than the sum of its proper divisors (58463649).

131216751 is a wasteful number, since it uses less digits than its factorization.

131216751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11166 (or 11163 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 131216751 is about 11454.9880401509. The cubic root of 131216751 is about 508.1552615611.

Adding to 131216751 its reverse (157612131), we get a palindrome (288828882).

The spelling of 131216751 in words is "one hundred thirty-one million, two hundred sixteen thousand, seven hundred fifty-one".