56033391 has 4 divisors (see below), whose sum is σ = 74711192. Its totient is φ = 37355592.

The previous prime is 56033389. The next prime is 56033401. The reversal of 56033391 is 19333065.

56033391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56033391 - 2¹ = 56033389 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 (56033321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9338896 + ... + 9338901.

It is an arithmetic number, because the mean of its divisors is an integer number (18677798).

Almost surely, 2^56033391 is an apocalyptic number.

56033391 is a deficient number, since it is larger than the sum of its proper divisors (18677801).

56033391 is a wasteful number, since it uses less digits than its factorization.

56033391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18677800.

The product of its (nonzero) digits is 7290, while the sum is 30.

The square root of 56033391 is about 7485.5454711063. The cubic root of 56033391 is about 382.6622627376.

The spelling of 56033391 in words is "fifty-six million, thirty-three thousand, three hundred ninety-one".