56821144 has 8 divisors (see below), whose sum is σ = 106539660. Its totient is φ = 28410568.

The previous prime is 56821133. The next prime is 56821147. The reversal of 56821144 is 44112865.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3551314 + ... + 3551329.

Almost surely, 2^56821144 is an apocalyptic number.

It is an amenable number.

56821144 is a deficient number, since it is larger than the sum of its proper divisors (49718516).

56821144 is a wasteful number, since it uses less digits than its factorization.

56821144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102649 (or 7102645 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 56821144 is about 7537.9801007962. The cubic root of 56821144 is about 384.4471606561.

It can be divided in two parts, 56821 and 144, that added together give a palindrome (56965).

The spelling of 56821144 in words is "fifty-six million, eight hundred twenty-one thousand, one hundred forty-four".