56503791 has 8 divisors (see below), whose sum is σ = 83709360. Its totient is φ = 37669176.

The previous prime is 56503757. The next prime is 56503817. The reversal of 56503791 is 19730565.

It is a happy number.

56503791 is a `hidden beast` number, since 565 + 0 + 3 + 7 + 91 = 666.

It is not a de Polignac number, because 56503791 - 2¹⁴ = 56487407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56503691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046340 + ... + 1046393.

It is an arithmetic number, because the mean of its divisors is an integer number (10463670).

Almost surely, 2^56503791 is an apocalyptic number.

56503791 is a deficient number, since it is larger than the sum of its proper divisors (27205569).

56503791 is a wasteful number, since it uses less digits than its factorization.

56503791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092742 (or 2092736 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 56503791 is about 7516.9003585254. The cubic root of 56503791 is about 383.7300959802.

The spelling of 56503791 in words is "fifty-six million, five hundred three thousand, seven hundred ninety-one".