57220223 has 4 divisors (see below), whose sum is σ = 57248040. Its totient is φ = 57192408.

The previous prime is 57220217. The next prime is 57220259. The reversal of 57220223 is 32202275.

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 57220223 - 2²² = 53025919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57220213) 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, 10553 + ... + 15026.

It is an arithmetic number, because the mean of its divisors is an integer number (14312010).

Almost surely, 2^57220223 is an apocalyptic number.

57220223 is a deficient number, since it is larger than the sum of its proper divisors (27817).

57220223 is a wasteful number, since it uses less digits than its factorization.

57220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27816.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 57220223 is about 7564.4049997340. The cubic root of 57220223 is about 385.3451068754.

Adding to 57220223 its reverse (32202275), we get a palindrome (89422498).

The spelling of 57220223 in words is "fifty-seven million, two hundred twenty thousand, two hundred twenty-three".