56819 has 4 divisors (see below), whose sum is σ = 64944. Its totient is φ = 48696.

The previous prime is 56813. The next prime is 56821. The reversal of 56819 is 91865.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56819 is a prime.

It is a super-2 number, since 2×56819² = 6456797522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56791 and 56800.

It is not an unprimeable number, because it can be changed into a prime (56813) 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, 4052 + ... + 4065.

It is an arithmetic number, because the mean of its divisors is an integer number (16236).

2⁵⁶⁸¹⁹ is an apocalyptic number.

56819 is a deficient number, since it is larger than the sum of its proper divisors (8125).

56819 is an equidigital number, since it uses as much as digits as its factorization.

56819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124.

The product of its digits is 2160, while the sum is 29.

The square root of 56819 is about 238.3673635379. The cubic root of 56819 is about 38.4442325220. Note that the first 3 decimals are identical.

The spelling of 56819 in words is "fifty-six thousand, eight hundred nineteen".