556535221241 has 2 divisors, whose sum is σ = 556535221242. Its totient is φ = 556535221240.

The previous prime is 556535221223. The next prime is 556535221243. The reversal of 556535221241 is 142122535655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420377173225 + 136158048016 = 648365^2 + 368996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556535221241 is a prime.

It is a Sophie Germain prime.

Together with 556535221243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (556535221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278267610620 + 278267610621.

It is an arithmetic number, because the mean of its divisors is an integer number (278267610621).

Almost surely, 2^556535221241 is an apocalyptic number.

It is an amenable number.

556535221241 is a deficient number, since it is larger than the sum of its proper divisors (1).

556535221241 is an equidigital number, since it uses as much as digits as its factorization.

556535221241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360000, while the sum is 41.

Adding to 556535221241 its reverse (142122535655), we get a palindrome (698657756896).

The spelling of 556535221241 in words is "five hundred fifty-six billion, five hundred thirty-five million, two hundred twenty-one thousand, two hundred forty-one".