57145477 has 2 divisors, whose sum is σ = 57145478. Its totient is φ = 57145476.

The previous prime is 57145469. The next prime is 57145511. The reversal of 57145477 is 77454175.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36796356 + 20349121 = 6066^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 57145477 - 2³ = 57145469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57145447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28572738 + 28572739.

It is an arithmetic number, because the mean of its divisors is an integer number (28572739).

Almost surely, 2^57145477 is an apocalyptic number.

It is an amenable number.

57145477 is a deficient number, since it is larger than the sum of its proper divisors (1).

57145477 is an equidigital number, since it uses as much as digits as its factorization.

57145477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137200, while the sum is 40.

The square root of 57145477 is about 7559.4627454602. The cubic root of 57145477 is about 385.1772434021.

The spelling of 57145477 in words is "fifty-seven million, one hundred forty-five thousand, four hundred seventy-seven".