51022512161 has 8 divisors (see below), whose sum is σ = 51345647424. Its totient is φ = 50699500560.

The previous prime is 51022512157. The next prime is 51022512209. The reversal of 51022512161 is 16121522015.

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 51022512161 - 2² = 51022512157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51022512161.

It is not an unprimeable number, because it can be changed into a prime (51022562161) 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, 881660 + ... + 937746.

It is an arithmetic number, because the mean of its divisors is an integer number (6418205928).

Almost surely, 2^51022512161 is an apocalyptic number.

It is an amenable number.

51022512161 is a deficient number, since it is larger than the sum of its proper divisors (323135263).

51022512161 is a wasteful number, since it uses less digits than its factorization.

51022512161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61831.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 51022512161 in words is "fifty-one billion, twenty-two million, five hundred twelve thousand, one hundred sixty-one".