131223241 has 2 divisors, whose sum is σ = 131223242. Its totient is φ = 131223240.

The previous prime is 131223233. The next prime is 131223251. The reversal of 131223241 is 142322131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128595600 + 2627641 = 11340^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 131223241 - 2³ = 131223233 is a prime.

It is not a weakly prime, because it can be changed into another prime (131223251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65611620 + 65611621.

It is an arithmetic number, because the mean of its divisors is an integer number (65611621).

Almost surely, 2^131223241 is an apocalyptic number.

It is an amenable number.

131223241 is a deficient number, since it is larger than the sum of its proper divisors (1).

131223241 is an equidigital number, since it uses as much as digits as its factorization.

131223241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 131223241 is about 11455.2713193534. The cubic root of 131223241 is about 508.1636392345.

Adding to 131223241 its reverse (142322131), we get a palindrome (273545372).

The spelling of 131223241 in words is "one hundred thirty-one million, two hundred twenty-three thousand, two hundred forty-one".