131226643 has 2 divisors, whose sum is σ = 131226644. Its totient is φ = 131226642.

The previous prime is 131226617. The next prime is 131226647. The reversal of 131226643 is 346622131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131226643 - 2⁵ = 131226611 is a prime.

It is not a weakly prime, because it can be changed into another prime (131226647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65613321 + 65613322.

It is an arithmetic number, because the mean of its divisors is an integer number (65613322).

Almost surely, 2^131226643 is an apocalyptic number.

131226643 is a deficient number, since it is larger than the sum of its proper divisors (1).

131226643 is an equidigital number, since it uses as much as digits as its factorization.

131226643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 131226643 is about 11455.4198089812. The cubic root of 131226643 is about 508.1680306257.

Adding to 131226643 its reverse (346622131), we get a palindrome (477848774).

The spelling of 131226643 in words is "one hundred thirty-one million, two hundred twenty-six thousand, six hundred forty-three".