56511003 has 4 divisors (see below), whose sum is σ = 75348008. Its totient is φ = 37674000.

The previous prime is 56511001. The next prime is 56511029. The reversal of 56511003 is 30011565.

It is a happy number.

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

It is not a de Polignac number, because 56511003 - 2¹ = 56511001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56511001) 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, 9418498 + ... + 9418503.

It is an arithmetic number, because the mean of its divisors is an integer number (18837002).

Almost surely, 2^56511003 is an apocalyptic number.

56511003 is a deficient number, since it is larger than the sum of its proper divisors (18837005).

56511003 is a wasteful number, since it uses less digits than its factorization.

56511003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837004.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 56511003 is about 7517.3800622291. The cubic root of 56511003 is about 383.7464213964.

Adding to 56511003 its reverse (30011565), we get a palindrome (86522568).

The spelling of 56511003 in words is "fifty-six million, five hundred eleven thousand, three".