57475021 has 2 divisors, whose sum is σ = 57475022. Its totient is φ = 57475020.

The previous prime is 57475003. The next prime is 57475037. The reversal of 57475021 is 12057475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29278921 + 28196100 = 5411^2 + 5310^2 .

It is a cyclic number.

It is not a de Polignac number, because 57475021 - 2²¹ = 55377869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57475001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28737510 + 28737511.

It is an arithmetic number, because the mean of its divisors is an integer number (28737511).

Almost surely, 2^57475021 is an apocalyptic number.

It is an amenable number.

57475021 is a deficient number, since it is larger than the sum of its proper divisors (1).

57475021 is an equidigital number, since it uses as much as digits as its factorization.

57475021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 57475021 is about 7581.2281986496. The cubic root of 57475021 is about 385.9162323706.

The spelling of 57475021 in words is "fifty-seven million, four hundred seventy-five thousand, twenty-one".