56213777 has 4 divisors (see below), whose sum is σ = 56302116. Its totient is φ = 56125440.

The previous prime is 56213749. The next prime is 56213791. The reversal of 56213777 is 77731265.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54228496 + 1985281 = 7364^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 56213777 - 2¹⁰ = 56212753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56213777.

It is not an unprimeable number, because it can be changed into a prime (56213797) 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, 43208 + ... + 44489.

It is an arithmetic number, because the mean of its divisors is an integer number (14075529).

Almost surely, 2^56213777 is an apocalyptic number.

It is an amenable number.

56213777 is a deficient number, since it is larger than the sum of its proper divisors (88339).

56213777 is an equidigital number, since it uses as much as digits as its factorization.

56213777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88338.

The product of its digits is 61740, while the sum is 38.

The square root of 56213777 is about 7497.5847444360. The cubic root of 56213777 is about 383.0724525313.

The spelling of 56213777 in words is "fifty-six million, two hundred thirteen thousand, seven hundred seventy-seven".