51244222 has 8 divisors (see below), whose sum is σ = 81387936. Its totient is φ = 24114912.

The previous prime is 51244217. The next prime is 51244243. The reversal of 51244222 is 22244215.

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

It is a junction number, because it is equal to n+sod(n) for n = 51244193 and 51244202.

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, 753558 + ... + 753625.

It is an arithmetic number, because the mean of its divisors is an integer number (10173492).

Almost surely, 2^51244222 is an apocalyptic number.

51244222 is a deficient number, since it is larger than the sum of its proper divisors (30143714).

51244222 is a wasteful number, since it uses less digits than its factorization.

51244222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507202.

The product of its digits is 1280, while the sum is 22.

The square root of 51244222 is about 7158.5069672384. The cubic root of 51244222 is about 371.4339823528.

Adding to 51244222 its reverse (22244215), we get a palindrome (73488437).

The spelling of 51244222 in words is "fifty-one million, two hundred forty-four thousand, two hundred twenty-two".