57220243 has 4 divisors (see below), whose sum is σ = 57249088. Its totient is φ = 57191400.

The previous prime is 57220217. The next prime is 57220259. The reversal of 57220243 is 34202275.

57220243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57220243 - 2¹⁷ = 57089171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11208 + ... + 15493.

It is an arithmetic number, because the mean of its divisors is an integer number (14312272).

Almost surely, 2^57220243 is an apocalyptic number.

57220243 is a deficient number, since it is larger than the sum of its proper divisors (28845).

57220243 is a wasteful number, since it uses less digits than its factorization.

57220243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28844.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 57220243 is about 7564.4063217149. The cubic root of 57220243 is about 385.3451517716.

The spelling of 57220243 in words is "fifty-seven million, two hundred twenty thousand, two hundred forty-three".