556699321 has 4 divisors (see below), whose sum is σ = 556794000. Its totient is φ = 556604644.

The previous prime is 556699267. The next prime is 556699327. The reversal of 556699321 is 123996655.

556699321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123996655 = 5 ⋅24799331.

It is a cyclic number.

It is not a de Polignac number, because 556699321 - 2⁷ = 556699193 is a prime.

It is a super-2 number, since 2×556699321² = 619828268003722082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556699327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37891 + ... + 50488.

It is an arithmetic number, because the mean of its divisors is an integer number (139198500).

Almost surely, 2^556699321 is an apocalyptic number.

It is an amenable number.

556699321 is a deficient number, since it is larger than the sum of its proper divisors (94679).

556699321 is an equidigital number, since it uses as much as digits as its factorization.

556699321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94678.

The product of its digits is 437400, while the sum is 46.

The square root of 556699321 is about 23594.4764934508. The cubic root of 556699321 is about 822.6344583599.

The spelling of 556699321 in words is "five hundred fifty-six million, six hundred ninety-nine thousand, three hundred twenty-one".