56447 has 4 divisors (see below), whose sum is σ = 57696. Its totient is φ = 55200.

The previous prime is 56443. The next prime is 56453. The reversal of 56447 is 74465.

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 56447 - 2² = 56443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56443) 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, 554 + ... + 647.

It is an arithmetic number, because the mean of its divisors is an integer number (14424).

2⁵⁶⁴⁴⁷ is an apocalyptic number.

56447 is a deficient number, since it is larger than the sum of its proper divisors (1249).

56447 is a wasteful number, since it uses less digits than its factorization.

56447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its digits is 3360, while the sum is 26.

The square root of 56447 is about 237.5857739849. The cubic root of 56447 is about 38.3601492686.

The spelling of 56447 in words is "fifty-six thousand, four hundred forty-seven".