56777221 has 8 divisors (see below), whose sum is σ = 57657600. Its totient is φ = 55901040.

The previous prime is 56777197. The next prime is 56777239. The reversal of 56777221 is 12277765.

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

It is a cyclic number.

It is not a de Polignac number, because 56777221 - 2²¹ = 54680069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56777291) 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 7 ways as a sum of consecutive naturals, for example, 35640 + ... + 37198.

It is an arithmetic number, because the mean of its divisors is an integer number (7207200).

Almost surely, 2^56777221 is an apocalyptic number.

It is an amenable number.

56777221 is a deficient number, since it is larger than the sum of its proper divisors (880379).

56777221 is a wasteful number, since it uses less digits than its factorization.

56777221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its digits is 41160, while the sum is 37.

The square root of 56777221 is about 7535.0660912828. The cubic root of 56777221 is about 384.3480753256.

The spelling of 56777221 in words is "fifty-six million, seven hundred seventy-seven thousand, two hundred twenty-one".