56221243 has 4 divisors (see below), whose sum is σ = 60545968. Its totient is φ = 51896520.

The previous prime is 56221213. The next prime is 56221273. The reversal of 56221243 is 34212265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34212265 = 5 ⋅6842453.

It is an interprime number because it is at equal distance from previous prime (56221213) and next prime (56221273).

It is not a de Polignac number, because 56221243 - 2¹³ = 56213051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162343 + ... + 2162368.

It is an arithmetic number, because the mean of its divisors is an integer number (15136492).

Almost surely, 2^56221243 is an apocalyptic number.

56221243 is a deficient number, since it is larger than the sum of its proper divisors (4324725).

56221243 is a wasteful number, since it uses less digits than its factorization.

56221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324724.

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

The square root of 56221243 is about 7498.0826215773. The cubic root of 56221243 is about 383.0894109620.

The spelling of 56221243 in words is "fifty-six million, two hundred twenty-one thousand, two hundred forty-three".