57220306 has 32 divisors (see below), whose sum is σ = 104328000. Its totient is φ = 23177280.

The previous prime is 57220271. The next prime is 57220309. The reversal of 57220306 is 60302275.

57220306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (57220309) 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 15 ways as a sum of consecutive naturals, for example, 4845 + ... + 11743.

It is an arithmetic number, because the mean of its divisors is an integer number (3260250).

Almost surely, 2^57220306 is an apocalyptic number.

57220306 is a deficient number, since it is larger than the sum of its proper divisors (47107694).

57220306 is a wasteful number, since it uses less digits than its factorization.

57220306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6954.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 57220306 is about 7564.4104859533. The cubic root of 57220306 is about 385.3452931943.

The spelling of 57220306 in words is "fifty-seven million, two hundred twenty thousand, three hundred six".