555620101 has 2 divisors, whose sum is σ = 555620102. Its totient is φ = 555620100.

The previous prime is 555619997. The next prime is 555620119. The reversal of 555620101 is 101026555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312228900 + 243391201 = 17670^2 + 15601^2 .

It is a cyclic number.

It is not a de Polignac number, because 555620101 - 2⁷ = 555619973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555620141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277810050 + 277810051.

It is an arithmetic number, because the mean of its divisors is an integer number (277810051).

Almost surely, 2^555620101 is an apocalyptic number.

It is an amenable number.

555620101 is a deficient number, since it is larger than the sum of its proper divisors (1).

555620101 is an equidigital number, since it uses as much as digits as its factorization.

555620101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 555620101 is about 23571.5952154283. The cubic root of 555620101 is about 822.1025267615.

Adding to 555620101 its reverse (101026555), we get a palindrome (656646656).

The spelling of 555620101 in words is "five hundred fifty-five million, six hundred twenty thousand, one hundred one".