57278771 has 4 divisors (see below), whose sum is σ = 62485944. Its totient is φ = 52071600.

The previous prime is 57278761. The next prime is 57278773. The reversal of 57278771 is 17787275.

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 57278771 - 2¹⁸ = 57016627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57278773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603570 + ... + 2603591.

It is an arithmetic number, because the mean of its divisors is an integer number (15621486).

Almost surely, 2^57278771 is an apocalyptic number.

57278771 is a deficient number, since it is larger than the sum of its proper divisors (5207173).

57278771 is a wasteful number, since it uses less digits than its factorization.

57278771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207172.

The product of its digits is 192080, while the sum is 44.

The square root of 57278771 is about 7568.2739775989. The cubic root of 57278771 is about 385.4764910470.

The spelling of 57278771 in words is "fifty-seven million, two hundred seventy-eight thousand, seven hundred seventy-one".