51222197672 has 16 divisors (see below), whose sum is σ = 96992529300. Its totient is φ = 25357523200.

The previous prime is 51222197669. The next prime is 51222197683. The reversal of 51222197672 is 27679122215.

It can be written as a sum of positive squares in 2 ways, for example, as 51010029316 + 212168356 = 225854^2 + 14566^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31696097 + ... + 31697712.

Almost surely, 2^51222197672 is an apocalyptic number.

It is an amenable number.

51222197672 is a deficient number, since it is larger than the sum of its proper divisors (45770331628).

51222197672 is a wasteful number, since it uses less digits than its factorization.

51222197672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63393916 (or 63393912 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The spelling of 51222197672 in words is "fifty-one billion, two hundred twenty-two million, one hundred ninety-seven thousand, six hundred seventy-two".