56556503 has 4 divisors (see below), whose sum is σ = 57075480. Its totient is φ = 56037528.

The previous prime is 56556491. The next prime is 56556523. The reversal of 56556503 is 30565565.

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

It is a cyclic number.

It is not a de Polignac number, because 56556503 - 2⁶ = 56556439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56556523) 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, 259325 + ... + 259542.

It is an arithmetic number, because the mean of its divisors is an integer number (14268870).

Almost surely, 2^56556503 is an apocalyptic number.

56556503 is a deficient number, since it is larger than the sum of its proper divisors (518977).

56556503 is a wasteful number, since it uses less digits than its factorization.

56556503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518976.

The product of its (nonzero) digits is 67500, while the sum is 35.

The square root of 56556503 is about 7520.4057736268. The cubic root of 56556503 is about 383.8493852868.

The spelling of 56556503 in words is "fifty-six million, five hundred fifty-six thousand, five hundred three".