556558001 has 4 divisors (see below), whose sum is σ = 556815600. Its totient is φ = 556300404.

The previous prime is 556557997. The next prime is 556558003. The reversal of 556558001 is 100855655.

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 556558001 - 2² = 556557997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556558003) 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, 125531 + ... + 129888.

It is an arithmetic number, because the mean of its divisors is an integer number (139203900).

Almost surely, 2^556558001 is an apocalyptic number.

It is an amenable number.

556558001 is a deficient number, since it is larger than the sum of its proper divisors (257599).

556558001 is a wasteful number, since it uses less digits than its factorization.

556558001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257598.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 556558001 is about 23591.4815346557. The cubic root of 556558001 is about 822.5648429584.

The spelling of 556558001 in words is "five hundred fifty-six million, five hundred fifty-eight thousand, one".