51423222 has 8 divisors (see below), whose sum is σ = 102846456. Its totient is φ = 17141072.

The previous prime is 51423209. The next prime is 51423247. The reversal of 51423222 is 22232415.

It is a sphenic number, since it is the product of 3 distinct primes.

51423222 is an admirable number.

It is a super-2 number, since 2×51423222² = 5288695521722568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4285263 + ... + 4285274.

It is an arithmetic number, because the mean of its divisors is an integer number (12855807).

Almost surely, 2^51423222 is an apocalyptic number.

51423222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51423222 is a wasteful number, since it uses less digits than its factorization.

51423222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8570542.

The product of its digits is 960, while the sum is 21.

The square root of 51423222 is about 7170.9986752195. The cubic root of 51423222 is about 371.8659622312.

Adding to 51423222 its reverse (22232415), we get a palindrome (73655637).

The spelling of 51423222 in words is "fifty-one million, four hundred twenty-three thousand, two hundred twenty-two".