57222213 has 4 divisors (see below), whose sum is σ = 76296288. Its totient is φ = 38148140.

The previous prime is 57222203. The next prime is 57222223. The reversal of 57222213 is 31222275.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (57222203) and next prime (57222223).

It is a cyclic number.

It is not a de Polignac number, because 57222213 - 2⁴ = 57222197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9537033 + ... + 9537038.

It is an arithmetic number, because the mean of its divisors is an integer number (19074072).

Almost surely, 2^57222213 is an apocalyptic number.

It is an amenable number.

57222213 is a deficient number, since it is larger than the sum of its proper divisors (19074075).

57222213 is a wasteful number, since it uses less digits than its factorization.

57222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19074074.

The product of its digits is 1680, while the sum is 24.

The square root of 57222213 is about 7564.5365357040. The cubic root of 57222213 is about 385.3495739900.

Adding to 57222213 its reverse (31222275), we get a palindrome (88444488).

The spelling of 57222213 in words is "fifty-seven million, two hundred twenty-two thousand, two hundred thirteen".