131227637 has 4 divisors (see below), whose sum is σ = 131321280. Its totient is φ = 131133996.

The previous prime is 131227631. The next prime is 131227643. The reversal of 131227637 is 736722131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131227631) and next prime (131227643).

It is a cyclic number.

It is not a de Polignac number, because 131227637 - 2¹⁸ = 130965493 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 (131227631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44687 + ... + 47532.

It is an arithmetic number, because the mean of its divisors is an integer number (32830320).

Almost surely, 2^131227637 is an apocalyptic number.

It is an amenable number.

131227637 is a deficient number, since it is larger than the sum of its proper divisors (93643).

131227637 is an equidigital number, since it uses as much as digits as its factorization.

131227637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93642.

The product of its digits is 10584, while the sum is 32.

The square root of 131227637 is about 11455.4631944762. The cubic root of 131227637 is about 508.1693136928.

Adding to 131227637 its reverse (736722131), we get a palindrome (867949768).

The spelling of 131227637 in words is "one hundred thirty-one million, two hundred twenty-seven thousand, six hundred thirty-seven".