56503997 has 4 divisors (see below), whose sum is σ = 61640736. Its totient is φ = 51367260.

The previous prime is 56503991. The next prime is 56503999. The reversal of 56503997 is 79930565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56503997 - 2¹⁶ = 56438461 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 (56503991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568353 + ... + 2568374.

It is an arithmetic number, because the mean of its divisors is an integer number (15410184).

Almost surely, 2^56503997 is an apocalyptic number.

It is an amenable number.

56503997 is a deficient number, since it is larger than the sum of its proper divisors (5136739).

56503997 is a wasteful number, since it uses less digits than its factorization.

56503997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136738.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 56503997 is about 7516.9140609694. The cubic root of 56503997 is about 383.7305623106.

The spelling of 56503997 in words is "fifty-six million, five hundred three thousand, nine hundred ninety-seven".