56771549 has 2 divisors, whose sum is σ = 56771550. Its totient is φ = 56771548.

The previous prime is 56771543. The next prime is 56771569. The reversal of 56771549 is 94517765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 145924 = 7525^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 56771549 - 2²⁰ = 55722973 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56771543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28385774 + 28385775.

It is an arithmetic number, because the mean of its divisors is an integer number (28385775).

Almost surely, 2^56771549 is an apocalyptic number.

It is an amenable number.

56771549 is a deficient number, since it is larger than the sum of its proper divisors (1).

56771549 is an equidigital number, since it uses as much as digits as its factorization.

56771549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 44.

The square root of 56771549 is about 7534.6897082760. The cubic root of 56771549 is about 384.3352762086.

The spelling of 56771549 in words is "fifty-six million, seven hundred seventy-one thousand, five hundred forty-nine".