51767163221 has 8 divisors (see below), whose sum is σ = 55760423424. Its totient is φ = 47919112560.

The previous prime is 51767163193. The next prime is 51767163229. The reversal of 51767163221 is 12236176715.

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

It is a cyclic number.

It is not a de Polignac number, because 51767163221 - 2³⁴ = 34587294037 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 (51767163229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36301646 + ... + 36303071.

It is an arithmetic number, because the mean of its divisors is an integer number (6970052928).

Almost surely, 2^51767163221 is an apocalyptic number.

It is an amenable number.

51767163221 is a deficient number, since it is larger than the sum of its proper divisors (3993260203).

51767163221 is a wasteful number, since it uses less digits than its factorization.

51767163221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72604771.

The product of its digits is 105840, while the sum is 41.

The spelling of 51767163221 in words is "fifty-one billion, seven hundred sixty-seven million, one hundred sixty-three thousand, two hundred twenty-one".