851281996 has 12 divisors (see below), whose sum is σ = 1491706440. Its totient is φ = 425080160.

The previous prime is 851281993. The next prime is 851282027. The reversal of 851281996 is 699182158.

It is not an unprimeable number, because it can be changed into a prime (851281993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136786 + ... + 142873.

It is an arithmetic number, because the mean of its divisors is an integer number (124308870).

Almost surely, 2^851281996 is an apocalyptic number.

It is an amenable number.

851281996 is a deficient number, since it is larger than the sum of its proper divisors (640424444).

851281996 is a wasteful number, since it uses less digits than its factorization.

851281996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280424 (or 280422 counting only the distinct ones).

The product of its digits is 311040, while the sum is 49.

The square root of 851281996 is about 29176.7372404798. The cubic root of 851281996 is about 947.7442309401.

The spelling of 851281996 in words is "eight hundred fifty-one million, two hundred eighty-one thousand, nine hundred ninety-six".