553221997 has 2 divisors, whose sum is σ = 553221998. Its totient is φ = 553221996.

The previous prime is 553221947. The next prime is 553222027. The reversal of 553221997 is 799122355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328551876 + 224670121 = 18126^2 + 14989^2 .

It is a cyclic number.

It is not a de Polignac number, because 553221997 - 2¹¹ = 553219949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553221947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276610998 + 276610999.

It is an arithmetic number, because the mean of its divisors is an integer number (276610999).

Almost surely, 2^553221997 is an apocalyptic number.

It is an amenable number.

553221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

553221997 is an equidigital number, since it uses as much as digits as its factorization.

553221997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 43.

The square root of 553221997 is about 23520.6716953407. The cubic root of 553221997 is about 820.9180660454.

The spelling of 553221997 in words is "five hundred fifty-three million, two hundred twenty-one thousand, nine hundred ninety-seven".