131267221 has 4 divisors (see below), whose sum is σ = 131376652. Its totient is φ = 131157792.

The previous prime is 131267209. The next prime is 131267243. The reversal of 131267221 is 122762131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122762131 = 2239 ⋅54829.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 118919025 = 3514^2 + 10905^2 .

It is a cyclic number.

It is not a de Polignac number, because 131267221 - 2⁵ = 131267189 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 (131267321) 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 3 ways as a sum of consecutive naturals, for example, 52896 + ... + 55321.

It is an arithmetic number, because the mean of its divisors is an integer number (32844163).

Almost surely, 2^131267221 is an apocalyptic number.

It is an amenable number.

131267221 is a deficient number, since it is larger than the sum of its proper divisors (109431).

131267221 is a wasteful number, since it uses less digits than its factorization.

131267221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109430.

The product of its digits is 1008, while the sum is 25.

The square root of 131267221 is about 11457.1907987953. The cubic root of 131267221 is about 508.2204039264.

The spelling of 131267221 in words is "one hundred thirty-one million, two hundred sixty-seven thousand, two hundred twenty-one".