500005553 has 4 divisors (see below), whose sum is σ = 500132388. Its totient is φ = 499878720.

The previous prime is 500005511. The next prime is 500005567. The reversal of 500005553 is 355500005.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79263409 + 420742144 = 8903^2 + 20512^2 .

It is a cyclic number.

It is not a de Polignac number, because 500005553 - 2⁶ = 500005489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (500005573) 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, 57308 + ... + 65453.

It is an arithmetic number, because the mean of its divisors is an integer number (125033097).

Almost surely, 2^500005553 is an apocalyptic number.

It is an amenable number.

500005553 is a deficient number, since it is larger than the sum of its proper divisors (126835).

500005553 is a wasteful number, since it uses less digits than its factorization.

500005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126834.

The product of its (nonzero) digits is 1875, while the sum is 23.

The square root of 500005553 is about 22360.8039435079. The cubic root of 500005553 is about 793.7034642526.

Adding to 500005553 its reverse (355500005), we get a palindrome (855505558).

The spelling of 500005553 in words is "five hundred million, five thousand, five hundred fifty-three".