51871188222 has 432 divisors, whose sum is σ = 150527613600. Its totient is φ = 12857273856.

The previous prime is 51871188209. The next prime is 51871188269. The reversal of 51871188222 is 22288117815.

51871188222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 1401923988 + ... + 1401924024.

It is an arithmetic number, because the mean of its divisors is an integer number (348443550).

Almost surely, 2^51871188222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51871188222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75263806800).

51871188222 is an abundant number, since it is smaller than the sum of its proper divisors (98656425378).

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

51871188222 is a wasteful number, since it uses less digits than its factorization.

51871188222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 85 counting only the distinct ones).

The product of its digits is 143360, while the sum is 45.

The spelling of 51871188222 in words is "fifty-one billion, eight hundred seventy-one million, one hundred eighty-eight thousand, two hundred twenty-two".