51303222 has 12 divisors (see below), whose sum is σ = 111157020. Its totient is φ = 17101068.

The previous prime is 51303221. The next prime is 51303227. The reversal of 51303222 is 22230315.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2850179 = 51303222 / (5 + 1 + 3 + 0 + 3 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 51303195 and 51303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51303221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1425072 + ... + 1425107.

It is an arithmetic number, because the mean of its divisors is an integer number (9263085).

Almost surely, 2^51303222 is an apocalyptic number.

51303222 is an abundant number, since it is smaller than the sum of its proper divisors (59853798).

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

51303222 is a wasteful number, since it uses less digits than its factorization.

51303222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850187 (or 2850184 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51303222 is about 7162.6267528051. The cubic root of 51303222 is about 371.5764777668.

Adding to 51303222 its reverse (22230315), we get a palindrome (73533537).

The spelling of 51303222 in words is "fifty-one million, three hundred three thousand, two hundred twenty-two".