51222432222 has 96 divisors (see below), whose sum is σ = 123848524800. Its totient is φ = 15199119936.

The previous prime is 51222432211. The next prime is 51222432241. The reversal of 51222432222 is 22223422215.

It is a happy number.

51222432222 is a `hidden beast` number, since 5 + 1 + 2 + 2 + 2 + 432 + 222 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 762679 + ... + 827117.

It is an arithmetic number, because the mean of its divisors is an integer number (1290088800).

Almost surely, 2^51222432222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51222432222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61924262400).

51222432222 is an abundant number, since it is smaller than the sum of its proper divisors (72626092578).

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

51222432222 is a wasteful number, since it uses less digits than its factorization.

51222432222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64582 (or 64579 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

Adding to 51222432222 its reverse (22223422215), we get a palindrome (73445854437).

It can be divided in two parts, 512224 and 32222, that added together give a triangular number (544446 = T₁₀₄₃).

The spelling of 51222432222 in words is "fifty-one billion, two hundred twenty-two million, four hundred thirty-two thousand, two hundred twenty-two".