131023229 has 2 divisors, whose sum is σ = 131023230. Its totient is φ = 131023228.

The previous prime is 131023223. The next prime is 131023231. The reversal of 131023229 is 922320131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112317604 + 18705625 = 10598^2 + 4325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131023229 is a prime.

Together with 131023231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131023223) 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 as a sum of consecutive naturals, namely, 65511614 + 65511615.

It is an arithmetic number, because the mean of its divisors is an integer number (65511615).

Almost surely, 2^131023229 is an apocalyptic number.

It is an amenable number.

131023229 is a deficient number, since it is larger than the sum of its proper divisors (1).

131023229 is an equidigital number, since it uses as much as digits as its factorization.

131023229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 131023229 is about 11446.5378608556. The cubic root of 131023229 is about 507.9053249590.

The spelling of 131023229 in words is "one hundred thirty-one million, twenty-three thousand, two hundred twenty-nine".