57193291 has 4 divisors (see below), whose sum is σ = 57227152. Its totient is φ = 57159432.

The previous prime is 57193289. The next prime is 57193327. The reversal of 57193291 is 19239175.

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

It is a 3-Lehmer number, since φ(57193291) divides (57193291-1)³.

It is a cyclic number.

It is not a de Polignac number, because 57193291 - 2¹ = 57193289 is a prime.

It is a deceptive number, since it divides R_57193290.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57193291.

It is not an unprimeable number, because it can be changed into a prime (57193691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14256 + ... + 17821.

It is an arithmetic number, because the mean of its divisors is an integer number (14306788).

Almost surely, 2^57193291 is an apocalyptic number.

57193291 is a deficient number, since it is larger than the sum of its proper divisors (33861).

57193291 is a wasteful number, since it uses less digits than its factorization.

57193291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33860.

The product of its digits is 17010, while the sum is 37.

The square root of 57193291 is about 7562.6246105436. The cubic root of 57193291 is about 385.2846402401.

The spelling of 57193291 in words is "fifty-seven million, one hundred ninety-three thousand, two hundred ninety-one".