51220051222 has 16 divisors (see below), whose sum is σ = 78836777712. Its totient is φ = 24943233280.

The previous prime is 51220051193. The next prime is 51220051271. The reversal of 51220051222 is 22215002215.

It is a junction number, because it is equal to n+sod(n) for n = 51220051193 and 51220051202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478048 + ... + 575299.

It is an arithmetic number, because the mean of its divisors is an integer number (4927298607).

Almost surely, 2^51220051222 is an apocalyptic number.

51220051222 is a deficient number, since it is larger than the sum of its proper divisors (27616726490).

51220051222 is a wasteful number, since it uses less digits than its factorization.

51220051222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053983.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 51220051222 its reverse (22215002215), we get a palindrome (73435053437).

The spelling of 51220051222 in words is "fifty-one billion, two hundred twenty million, fifty-one thousand, two hundred twenty-two".