57216806 has 4 divisors (see below), whose sum is σ = 85825212. Its totient is φ = 28608402.

The previous prime is 57216799. The next prime is 57216811. The reversal of 57216806 is 60861275.

57216806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 14304200 + ... + 14304203.

It is an arithmetic number, because the mean of its divisors is an integer number (21456303).

Almost surely, 2^57216806 is an apocalyptic number.

57216806 is a deficient number, since it is larger than the sum of its proper divisors (28608406).

57216806 is a wasteful number, since it uses less digits than its factorization.

57216806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28608405.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 57216806 is about 7564.1791359010. The cubic root of 57216806 is about 385.3374362165.

The spelling of 57216806 in words is "fifty-seven million, two hundred sixteen thousand, eight hundred six".