51304222 has 4 divisors (see below), whose sum is σ = 76956336. Its totient is φ = 25652110.

The previous prime is 51304193. The next prime is 51304223. The reversal of 51304222 is 22240315.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51304222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51304223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826054 + ... + 12826057.

It is an arithmetic number, because the mean of its divisors is an integer number (19239084).

Almost surely, 2^51304222 is an apocalyptic number.

51304222 is a deficient number, since it is larger than the sum of its proper divisors (25652114).

51304222 is a wasteful number, since it uses less digits than its factorization.

51304222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25652113.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51304222 is about 7162.6965592576. The cubic root of 51304222 is about 371.5788920015.

Adding to 51304222 its reverse (22240315), we get a palindrome (73544537).

The spelling of 51304222 in words is "fifty-one million, three hundred four thousand, two hundred twenty-two".