57281223 has 8 divisors (see below), whose sum is σ = 78237936. Its totient is φ = 37256000.

The previous prime is 57281209. The next prime is 57281227. The reversal of 57281223 is 32218275.

57281223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57281223 - 2⁹ = 57280711 is a prime.

It is a super-2 number, since 2×57281223² = 6562277016751458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57281227) 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 7 ways as a sum of consecutive naturals, for example, 232728 + ... + 232973.

It is an arithmetic number, because the mean of its divisors is an integer number (9779742).

Almost surely, 2^57281223 is an apocalyptic number.

57281223 is a deficient number, since it is larger than the sum of its proper divisors (20956713).

57281223 is a wasteful number, since it uses less digits than its factorization.

57281223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465745.

The product of its digits is 6720, while the sum is 30.

The square root of 57281223 is about 7568.4359678866. The cubic root of 57281223 is about 385.4819914843.

Adding to 57281223 its reverse (32218275), we get a palindrome (89499498).

The spelling of 57281223 in words is "fifty-seven million, two hundred eighty-one thousand, two hundred twenty-three".