56519191 has 4 divisors (see below), whose sum is σ = 56964352. Its totient is φ = 56074032.

The previous prime is 56519179. The next prime is 56519201. The reversal of 56519191 is 19191565.

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 56519191 - 2⁵ = 56519159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56519191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56519131) 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, 222390 + ... + 222643.

It is an arithmetic number, because the mean of its divisors is an integer number (14241088).

Almost surely, 2^56519191 is an apocalyptic number.

56519191 is a deficient number, since it is larger than the sum of its proper divisors (445161).

56519191 is a wasteful number, since it uses less digits than its factorization.

56519191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445160.

The product of its digits is 12150, while the sum is 37.

The square root of 56519191 is about 7517.9246471350. The cubic root of 56519191 is about 383.7649544477.

The spelling of 56519191 in words is "fifty-six million, five hundred nineteen thousand, one hundred ninety-one".