51229873391 has 8 divisors (see below), whose sum is σ = 53052499968. Its totient is φ = 49417875000.

The previous prime is 51229873379. The next prime is 51229873441. The reversal of 51229873391 is 19337892215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51229873391 - 2¹⁸ = 51229611247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51229873301) 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 7 ways as a sum of consecutive naturals, for example, 2647235 + ... + 2666516.

It is an arithmetic number, because the mean of its divisors is an integer number (6631562496).

Almost surely, 2^51229873391 is an apocalyptic number.

51229873391 is a deficient number, since it is larger than the sum of its proper divisors (1822626577).

51229873391 is a wasteful number, since it uses less digits than its factorization.

51229873391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5314093.

The product of its digits is 816480, while the sum is 50.

The spelling of 51229873391 in words is "fifty-one billion, two hundred twenty-nine million, eight hundred seventy-three thousand, three hundred ninety-one".