51323202291 has 4 divisors (see below), whose sum is σ = 68430936392. Its totient is φ = 34215468192.

The previous prime is 51323202289. The next prime is 51323202311. The reversal of 51323202291 is 19220232315.

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

It is not a de Polignac number, because 51323202291 - 2¹ = 51323202289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51323202241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8553867046 + ... + 8553867051.

It is an arithmetic number, because the mean of its divisors is an integer number (17107734098).

Almost surely, 2^51323202291 is an apocalyptic number.

51323202291 is a deficient number, since it is larger than the sum of its proper divisors (17107734101).

51323202291 is a wasteful number, since it uses less digits than its factorization.

51323202291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107734100.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 51323202291 in words is "fifty-one billion, three hundred twenty-three million, two hundred two thousand, two hundred ninety-one".