51071222 has 4 divisors (see below), whose sum is σ = 76606836. Its totient is φ = 25535610.

The previous prime is 51071197. The next prime is 51071227. The reversal of 51071222 is 22217015.

51071222 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, and also an emirpimes, since its reverse is a distinct semiprime: 22217015 = 5 ⋅4443403.

It is a junction number, because it is equal to n+sod(n) for n = 51071194 and 51071203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071227) 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 as a sum of consecutive naturals, namely, 12767804 + ... + 12767807.

It is an arithmetic number, because the mean of its divisors is an integer number (19151709).

Almost surely, 2^51071222 is an apocalyptic number.

51071222 is a deficient number, since it is larger than the sum of its proper divisors (25535614).

51071222 is a wasteful number, since it uses less digits than its factorization.

51071222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25535613.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 51071222 is about 7146.4132262275. The cubic root of 51071222 is about 371.0155252474.

Adding to 51071222 its reverse (22217015), we get a palindrome (73288237).

The spelling of 51071222 in words is "fifty-one million, seventy-one thousand, two hundred twenty-two".