131272237 has 4 divisors (see below), whose sum is σ = 131452060. Its totient is φ = 131092416.

The previous prime is 131272151. The next prime is 131272243. The reversal of 131272237 is 732272131.

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: 732272131 = 733 ⋅999007.

It can be written as a sum of positive squares in 2 ways, for example, as 99620361 + 31651876 = 9981^2 + 5626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131272237 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 (131273237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88812 + ... + 90277.

It is an arithmetic number, because the mean of its divisors is an integer number (32863015).

Almost surely, 2^131272237 is an apocalyptic number.

It is an amenable number.

131272237 is a deficient number, since it is larger than the sum of its proper divisors (179823).

131272237 is an equidigital number, since it uses as much as digits as its factorization.

131272237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179822.

The product of its digits is 3528, while the sum is 28.

The square root of 131272237 is about 11457.4096985313. The cubic root of 131272237 is about 508.2268772385.

The spelling of 131272237 in words is "one hundred thirty-one million, two hundred seventy-two thousand, two hundred thirty-seven".