131544229 has 2 divisors, whose sum is σ = 131544230. Its totient is φ = 131544228.

The previous prime is 131544227. The next prime is 131544247. The reversal of 131544229 is 922445131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 14861025 = 10802^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 131544229 - 2¹ = 131544227 is a prime.

Together with 131544227, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 131544229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131544223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65772114 + 65772115.

It is an arithmetic number, because the mean of its divisors is an integer number (65772115).

Almost surely, 2^131544229 is an apocalyptic number.

It is an amenable number.

131544229 is a deficient number, since it is larger than the sum of its proper divisors (1).

131544229 is an equidigital number, since it uses as much as digits as its factorization.

131544229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 131544229 is about 11469.2732550934. The cubic root of 131544229 is about 508.5776451941.

The spelling of 131544229 in words is "one hundred thirty-one million, five hundred forty-four thousand, two hundred twenty-nine".