57131533 has 2 divisors, whose sum is σ = 57131534. Its totient is φ = 57131532.

The previous prime is 57131531. The next prime is 57131549. The reversal of 57131533 is 33513175.

57131533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40793769 + 16337764 = 6387^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 57131533 - 2¹ = 57131531 is a prime.

Together with 57131531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57131531) 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, 28565766 + 28565767.

It is an arithmetic number, because the mean of its divisors is an integer number (28565767).

Almost surely, 2^57131533 is an apocalyptic number.

It is an amenable number.

57131533 is a deficient number, since it is larger than the sum of its proper divisors (1).

57131533 is an equidigital number, since it uses as much as digits as its factorization.

57131533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4725, while the sum is 28.

The square root of 57131533 is about 7558.5404014267. The cubic root of 57131533 is about 385.1459119730.

The spelling of 57131533 in words is "fifty-seven million, one hundred thirty-one thousand, five hundred thirty-three".