57229561 has 2 divisors, whose sum is σ = 57229562. Its totient is φ = 57229560.

The previous prime is 57229553. The next prime is 57229567. The reversal of 57229561 is 16592275.

57229561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 1279161 = 7480^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 57229561 - 2³ = 57229553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57229561.

It is not a weakly prime, because it can be changed into another prime (57229567) 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, 28614780 + 28614781.

It is an arithmetic number, because the mean of its divisors is an integer number (28614781).

Almost surely, 2^57229561 is an apocalyptic number.

It is an amenable number.

57229561 is a deficient number, since it is larger than the sum of its proper divisors (1).

57229561 is an equidigital number, since it uses as much as digits as its factorization.

57229561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 57229561 is about 7565.0222075021. The cubic root of 57229561 is about 385.3660677449.

The spelling of 57229561 in words is "fifty-seven million, two hundred twenty-nine thousand, five hundred sixty-one".