57090222 has 96 divisors (see below), whose sum is σ = 147184128. Its totient is φ = 15657408.

The previous prime is 57090221. The next prime is 57090227. The reversal of 57090222 is 22209075.

It is a happy number.

57090222 is a `hidden beast` number, since 570 + 90 + 2 + 2 + 2 = 666.

57090222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57090221) 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 47 ways as a sum of consecutive naturals, for example, 554223 + ... + 554325.

It is an arithmetic number, because the mean of its divisors is an integer number (1533168).

Almost surely, 2^57090222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57090222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73592064).

57090222 is an abundant number, since it is smaller than the sum of its proper divisors (90093906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57090222 is a wasteful number, since it uses less digits than its factorization.

57090222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 57090222 is about 7555.8071706470. The cubic root of 57090222 is about 385.0530584096.

Adding to 57090222 its reverse (22209075), we get a palindrome (79299297).

The spelling of 57090222 in words is "fifty-seven million, ninety thousand, two hundred twenty-two".