131228251 has 12 divisors (see below), whose sum is σ = 164849776. Its totient is φ = 102255120.

The previous prime is 131228197. The next prime is 131228281. The reversal of 131228251 is 152822131.

It is not a de Polignac number, because 131228251 - 2⁹ = 131227739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131228281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76620 + ... + 78313.

Almost surely, 2^131228251 is an apocalyptic number.

131228251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131228251 is a deficient number, since it is larger than the sum of its proper divisors (33621525).

131228251 is a wasteful number, since it uses less digits than its factorization.

131228251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154962 (or 154951 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 131228251 is about 11455.4899938850. The cubic root of 131228251 is about 508.1701062481.

The spelling of 131228251 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, two hundred fifty-one".