57220756 has 6 divisors (see below), whose sum is σ = 100136330. Its totient is φ = 28610376.

The previous prime is 57220753. The next prime is 57220769. The reversal of 57220756 is 65702275.

It is a happy number.

57220756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 34810000 + 22410756 = 5900^2 + 4734^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57220753) 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 as a sum of consecutive naturals, namely, 7152591 + ... + 7152598.

Almost surely, 2^57220756 is an apocalyptic number.

It is an amenable number.

57220756 is a deficient number, since it is larger than the sum of its proper divisors (42915574).

57220756 is a wasteful number, since it uses less digits than its factorization.

57220756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14305193 (or 14305191 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 57220756 is about 7564.4402304467. The cubic root of 57220756 is about 385.3463033540.

The spelling of 57220756 in words is "fifty-seven million, two hundred twenty thousand, seven hundred fifty-six".