57231511 has 2 divisors, whose sum is σ = 57231512. Its totient is φ = 57231510.

The previous prime is 57231509. The next prime is 57231523. The reversal of 57231511 is 11513275.

57231511 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 is a cyclic number.

It is not a de Polignac number, because 57231511 - 2¹ = 57231509 is a prime.

Together with 57231509, 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 (57231011) 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, 28615755 + 28615756.

It is an arithmetic number, because the mean of its divisors is an integer number (28615756).

Almost surely, 2^57231511 is an apocalyptic number.

57231511 is a deficient number, since it is larger than the sum of its proper divisors (1).

57231511 is an equidigital number, since it uses as much as digits as its factorization.

57231511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 57231511 is about 7565.1510890398. The cubic root of 57231511 is about 385.3704445931.

Adding to 57231511 its reverse (11513275), we get a palindrome (68744786).

The spelling of 57231511 in words is "fifty-seven million, two hundred thirty-one thousand, five hundred eleven".