56115503 has 4 divisors (see below), whose sum is σ = 56181840. Its totient is φ = 56049168.

The previous prime is 56115481. The next prime is 56115529. The reversal of 56115503 is 30551165.

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 56115503 - 2¹⁶ = 56049967 is a prime.

It is a super-3 number, since 3×56115503³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56115583) 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, 31883 + ... + 33596.

It is an arithmetic number, because the mean of its divisors is an integer number (14045460).

Almost surely, 2^56115503 is an apocalyptic number.

56115503 is a deficient number, since it is larger than the sum of its proper divisors (66337).

56115503 is an equidigital number, since it uses as much as digits as its factorization.

56115503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66336.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 56115503 is about 7491.0281670809. The cubic root of 56115503 is about 382.8490907898.

Adding to 56115503 its reverse (30551165), we get a palindrome (86666668).

The spelling of 56115503 in words is "fifty-six million, one hundred fifteen thousand, five hundred three".