57153991 has 2 divisors, whose sum is σ = 57153992. Its totient is φ = 57153990.

The previous prime is 57153989. The next prime is 57154003. The reversal of 57153991 is 19935175.

57153991 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 57153991 - 2¹ = 57153989 is a prime.

Together with 57153989, 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 (57153911) 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, 28576995 + 28576996.

It is an arithmetic number, because the mean of its divisors is an integer number (28576996).

Almost surely, 2^57153991 is an apocalyptic number.

57153991 is a deficient number, since it is larger than the sum of its proper divisors (1).

57153991 is an equidigital number, since it uses as much as digits as its factorization.

57153991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 40.

The square root of 57153991 is about 7560.0258597441. The cubic root of 57153991 is about 385.1963714030.

The spelling of 57153991 in words is "fifty-seven million, one hundred fifty-three thousand, nine hundred ninety-one".