51222242 has 8 divisors (see below), whose sum is σ = 80174016. Its totient is φ = 24497572.

The previous prime is 51222211. The next prime is 51222247. The reversal of 51222242 is 24222215.

51222242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (51222247) 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 in 3 ways as a sum of consecutive naturals, for example, 556718 + ... + 556809.

It is an arithmetic number, because the mean of its divisors is an integer number (10021752).

Almost surely, 2^51222242 is an apocalyptic number.

51222242 is a deficient number, since it is larger than the sum of its proper divisors (28951774).

51222242 is a wasteful number, since it uses less digits than its factorization.

51222242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113552.

The product of its digits is 640, while the sum is 20.

The square root of 51222242 is about 7156.9715662422. The cubic root of 51222242 is about 371.3808688104.

Adding to 51222242 its reverse (24222215), we get a palindrome (75444457).

The spelling of 51222242 in words is "fifty-one million, two hundred twenty-two thousand, two hundred forty-two".