851773122 has 48 divisors (see below), whose sum is σ = 1929814848. Its totient is φ = 271006560.

The previous prime is 851773067. The next prime is 851773171. The reversal of 851773122 is 221377158.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222073 + ... + 225875.

It is an arithmetic number, because the mean of its divisors is an integer number (40204476).

Almost surely, 2^851773122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851773122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964907424).

851773122 is an abundant number, since it is smaller than the sum of its proper divisors (1078041726).

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

851773122 is a wasteful number, since it uses less digits than its factorization.

851773122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375 (or 4372 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 851773122 is about 29185.1524237925. The cubic root of 851773122 is about 947.9264550648.

The spelling of 851773122 in words is "eight hundred fifty-one million, seven hundred seventy-three thousand, one hundred twenty-two".