51864206 has 4 divisors (see below), whose sum is σ = 77796312. Its totient is φ = 25932102.

The previous prime is 51864199. The next prime is 51864217. The reversal of 51864206 is 60246815.

51864206 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, 12966050 + ... + 12966053.

It is an arithmetic number, because the mean of its divisors is an integer number (19449078).

Almost surely, 2^51864206 is an apocalyptic number.

51864206 is a deficient number, since it is larger than the sum of its proper divisors (25932106).

51864206 is a wasteful number, since it uses less digits than its factorization.

51864206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25932105.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 51864206 is about 7201.6807760411. The cubic root of 51864206 is about 372.9259269231.

The spelling of 51864206 in words is "fifty-one million, eight hundred sixty-four thousand, two hundred six".