131228751 has 16 divisors (see below), whose sum is σ = 182655968. Its totient is φ = 83721600.

The previous prime is 131228743. The next prime is 131228771. The reversal of 131228751 is 157822131.

It is not a de Polignac number, because 131228751 - 2³ = 131228743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131228701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (11415998).

Almost surely, 2^131228751 is an apocalyptic number.

131228751 is a deficient number, since it is larger than the sum of its proper divisors (51427217).

131228751 is a wasteful number, since it uses less digits than its factorization.

131228751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19482.

The product of its digits is 3360, while the sum is 30.

The square root of 131228751 is about 11455.5118174615. The cubic root of 131228751 is about 508.1707516496.

The spelling of 131228751 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, seven hundred fifty-one".