51205422 has 16 divisors (see below), whose sum is σ = 102933072. Its totient is φ = 16981440.

The previous prime is 51205417. The next prime is 51205423. The reversal of 51205422 is 22450215.

It is a happy number.

51205422 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 not an unprimeable number, because it can be changed into a prime (51205423) by changing a digit.

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, 20479 + ... + 22842.

It is an arithmetic number, because the mean of its divisors is an integer number (6433317).

Almost surely, 2^51205422 is an apocalyptic number.

51205422 is an abundant number, since it is smaller than the sum of its proper divisors (51727650).

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

51205422 is a wasteful number, since it uses less digits than its factorization.

51205422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43523.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51205422 is about 7155.7963917373. The cubic root of 51205422 is about 371.3402138798.

Adding to 51205422 its reverse (22450215), we get a palindrome (73655637).

The spelling of 51205422 in words is "fifty-one million, two hundred five thousand, four hundred twenty-two".