57781271 has 2 divisors, whose sum is σ = 57781272. Its totient is φ = 57781270.

The previous prime is 57781219. The next prime is 57781277. The reversal of 57781271 is 17218775.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57781271 - 2¹⁴ = 57764887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57781277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28890635 + 28890636.

It is an arithmetic number, because the mean of its divisors is an integer number (28890636).

Almost surely, 2^57781271 is an apocalyptic number.

57781271 is a deficient number, since it is larger than the sum of its proper divisors (1).

57781271 is an equidigital number, since it uses as much as digits as its factorization.

57781271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 38.

The square root of 57781271 is about 7601.3992790801. The cubic root of 57781271 is about 386.6004574342.

The spelling of 57781271 in words is "fifty-seven million, seven hundred eighty-one thousand, two hundred seventy-one".