57781227 has 16 divisors (see below), whose sum is σ = 88858880. Its totient is φ = 32713632.

The previous prime is 57781219. The next prime is 57781271. The reversal of 57781227 is 72218775.

It is not a de Polignac number, because 57781227 - 2³ = 57781219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57781277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10333 + ... + 14910.

It is an arithmetic number, because the mean of its divisors is an integer number (5553680).

Almost surely, 2^57781227 is an apocalyptic number.

57781227 is a deficient number, since it is larger than the sum of its proper divisors (31077653).

57781227 is a wasteful number, since it uses less digits than its factorization.

57781227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25362.

The product of its digits is 54880, while the sum is 39.

The square root of 57781227 is about 7601.3963848756. The cubic root of 57781227 is about 386.6003593031.

The spelling of 57781227 in words is "fifty-seven million, seven hundred eighty-one thousand, two hundred twenty-seven".