555002221 has 4 divisors (see below), whose sum is σ = 555097312. Its totient is φ = 554907132.

The previous prime is 555002219. The next prime is 555002233. The reversal of 555002221 is 122200555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 555002221 - 2¹ = 555002219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555002192 and 555002201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555092221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38175 + ... + 50668.

It is an arithmetic number, because the mean of its divisors is an integer number (138774328).

Almost surely, 2^555002221 is an apocalyptic number.

It is an amenable number.

555002221 is a deficient number, since it is larger than the sum of its proper divisors (95091).

555002221 is an equidigital number, since it uses as much as digits as its factorization.

555002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95090.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 555002221 is about 23558.4851168321. The cubic root of 555002221 is about 821.7976727086.

Adding to 555002221 its reverse (122200555), we get a palindrome (677202776).

The spelling of 555002221 in words is "five hundred fifty-five million, two thousand, two hundred twenty-one".