51012222 has 16 divisors (see below), whose sum is σ = 103462272. Its totient is φ = 16764440.

The previous prime is 51012211. The next prime is 51012253. The reversal of 51012222 is 22221015.

51012222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 59448 + ... + 60299.

It is an arithmetic number, because the mean of its divisors is an integer number (6466392).

Almost surely, 2^51012222 is an apocalyptic number.

51012222 is an abundant number, since it is smaller than the sum of its proper divisors (52450050).

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

51012222 is a wasteful number, since it uses less digits than its factorization.

51012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119823.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51012222 is about 7142.2840884412. The cubic root of 51012222 is about 370.8725983701.

Adding to 51012222 its reverse (22221015), we get a palindrome (73233237).

The spelling of 51012222 in words is "fifty-one million, twelve thousand, two hundred twenty-two".