56243321 has 4 divisors (see below), whose sum is σ = 56426832. Its totient is φ = 56059812.

The previous prime is 56243311. The next prime is 56243323. The reversal of 56243321 is 12334265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56243321 - 2¹⁰ = 56242297 is a prime.

It is a super-2 number, since 2×56243321² = 6326622314218082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56243323) 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, 91295 + ... + 91908.

It is an arithmetic number, because the mean of its divisors is an integer number (14106708).

Almost surely, 2^56243321 is an apocalyptic number.

It is an amenable number.

56243321 is a deficient number, since it is larger than the sum of its proper divisors (183511).

56243321 is a wasteful number, since it uses less digits than its factorization.

56243321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183510.

The product of its digits is 4320, while the sum is 26.

The square root of 56243321 is about 7499.5547201151. The cubic root of 56243321 is about 383.1395506167.

Adding to 56243321 its reverse (12334265), we get a palindrome (68577586).

The spelling of 56243321 in words is "fifty-six million, two hundred forty-three thousand, three hundred twenty-one".