131122251 has 24 divisors (see below), whose sum is σ = 204575280. Its totient is φ = 80450496.

The previous prime is 131122247. The next prime is 131122259. The reversal of 131122251 is 152221131.

It is not a de Polignac number, because 131122251 - 2² = 131122247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131122259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42865 + ... + 45821.

It is an arithmetic number, because the mean of its divisors is an integer number (8523970).

Almost surely, 2^131122251 is an apocalyptic number.

131122251 is a deficient number, since it is larger than the sum of its proper divisors (73453029).

131122251 is a wasteful number, since it uses less digits than its factorization.

131122251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355 (or 3352 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 131122251 is about 11450.8624566012. The cubic root of 131122251 is about 508.0332440992.

Adding to 131122251 its reverse (152221131), we get a palindrome (283343382).

The spelling of 131122251 in words is "one hundred thirty-one million, one hundred twenty-two thousand, two hundred fifty-one".