556816247 has 4 divisors (see below), whose sum is σ = 599648280. Its totient is φ = 513984216.

The previous prime is 556816241. The next prime is 556816277. The reversal of 556816247 is 742618655.

556816247 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 an emirpimes, since its reverse is a distinct semiprime: 742618655 = 5 ⋅148523731.

It is a cyclic number.

It is not a de Polignac number, because 556816247 - 2²⁰ = 555767671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556816198 and 556816207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556816241) 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, 21415997 + ... + 21416022.

It is an arithmetic number, because the mean of its divisors is an integer number (149912070).

Almost surely, 2^556816247 is an apocalyptic number.

556816247 is a deficient number, since it is larger than the sum of its proper divisors (42832033).

556816247 is a wasteful number, since it uses less digits than its factorization.

556816247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832032.

The product of its digits is 403200, while the sum is 44.

The square root of 556816247 is about 23596.9541890474. The cubic root of 556816247 is about 822.6920481692.

The spelling of 556816247 in words is "five hundred fifty-six million, eight hundred sixteen thousand, two hundred forty-seven".