56019391 has 4 divisors (see below), whose sum is σ = 58967800. Its totient is φ = 53070984.

The previous prime is 56019377. The next prime is 56019401. The reversal of 56019391 is 19391065.

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 56019391 - 2¹³ = 56011199 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 (56019371) 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, 1474176 + ... + 1474213.

It is an arithmetic number, because the mean of its divisors is an integer number (14741950).

Almost surely, 2^56019391 is an apocalyptic number.

56019391 is a deficient number, since it is larger than the sum of its proper divisors (2948409).

56019391 is a wasteful number, since it uses less digits than its factorization.

56019391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948408.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 56019391 is about 7484.6102770953. The cubic root of 56019391 is about 382.6303905639.

The spelling of 56019391 in words is "fifty-six million, nineteen thousand, three hundred ninety-one".