57238691 has 4 divisors (see below), whose sum is σ = 57403992. Its totient is φ = 57073392.

The previous prime is 57238669. The next prime is 57238693. The reversal of 57238691 is 19683275.

57238691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57238691 - 2¹⁰ = 57237667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57238693) 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 in 3 ways as a sum of consecutive naturals, for example, 82130 + ... + 82823.

It is an arithmetic number, because the mean of its divisors is an integer number (14350998).

Almost surely, 2^57238691 is an apocalyptic number.

57238691 is a deficient number, since it is larger than the sum of its proper divisors (165301).

57238691 is a wasteful number, since it uses less digits than its factorization.

57238691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165300.

The product of its digits is 90720, while the sum is 41.

The square root of 57238691 is about 7565.6256185460. The cubic root of 57238691 is about 385.3865595156.

The spelling of 57238691 in words is "fifty-seven million, two hundred thirty-eight thousand, six hundred ninety-one".