56221423 has 4 divisors (see below), whose sum is σ = 56515968. Its totient is φ = 55926880.

The previous prime is 56221409. The next prime is 56221427. The reversal of 56221423 is 32412265.

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 56221423 - 2⁵ = 56221391 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146986 + ... + 147367.

It is an arithmetic number, because the mean of its divisors is an integer number (14128992).

Almost surely, 2^56221423 is an apocalyptic number.

56221423 is a deficient number, since it is larger than the sum of its proper divisors (294545).

56221423 is a wasteful number, since it uses less digits than its factorization.

56221423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294544.

The product of its digits is 2880, while the sum is 25.

The square root of 56221423 is about 7498.0946246363. The cubic root of 56221423 is about 383.0898197993.

Adding to 56221423 its reverse (32412265), we get a palindrome (88633688).

It can be divided in two parts, 56221 and 423, that added together give a square (56644 = 238²).

The spelling of 56221423 in words is "fifty-six million, two hundred twenty-one thousand, four hundred twenty-three".