51223206 has 8 divisors (see below), whose sum is σ = 102446424. Its totient is φ = 17074400.

The previous prime is 51223199. The next prime is 51223213. The reversal of 51223206 is 60232215.

51223206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51223199) and next prime (51223213).

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

51223206 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 4268595 + ... + 4268606.

It is an arithmetic number, because the mean of its divisors is an integer number (12805803).

Almost surely, 2^51223206 is an apocalyptic number.

51223206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51223206 is a wasteful number, since it uses less digits than its factorization.

51223206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8537206.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51223206 is about 7157.0389128466. The cubic root of 51223206 is about 371.3831985855.

Subtracting 51223206 from its reverse (60232215), we obtain a palindrome (9009009).

The spelling of 51223206 in words is "fifty-one million, two hundred twenty-three thousand, two hundred six".