51172798322 has 4 divisors (see below), whose sum is σ = 76759197486. Its totient is φ = 25586399160.

The previous prime is 51172798309. The next prime is 51172798349. The reversal of 51172798322 is 22389727115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50773158241 + 399640081 = 225329^2 + 19991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12793199579 + ... + 12793199582.

Almost surely, 2^51172798322 is an apocalyptic number.

51172798322 is a deficient number, since it is larger than the sum of its proper divisors (25586399164).

51172798322 is a wasteful number, since it uses less digits than its factorization.

51172798322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25586399163.

The product of its digits is 423360, while the sum is 47.

The spelling of 51172798322 in words is "fifty-one billion, one hundred seventy-two million, seven hundred ninety-eight thousand, three hundred twenty-two".