56771247 has 8 divisors (see below), whose sum is σ = 81517744. Its totient is φ = 34936128.

The previous prime is 56771243. The next prime is 56771249. The reversal of 56771247 is 74217765.

56771247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56771247 - 2² = 56771243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1455673 = 56771247 / (5 + 6 + 7 + 7 + 1 + 2 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56771243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727798 + ... + 727875.

It is an arithmetic number, because the mean of its divisors is an integer number (10189718).

Almost surely, 2^56771247 is an apocalyptic number.

56771247 is a deficient number, since it is larger than the sum of its proper divisors (24746497).

56771247 is a wasteful number, since it uses less digits than its factorization.

56771247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455689.

The product of its digits is 82320, while the sum is 39.

The square root of 56771247 is about 7534.6696676099. The cubic root of 56771247 is about 384.3345947084.

The spelling of 56771247 in words is "fifty-six million, seven hundred seventy-one thousand, two hundred forty-seven".