51451065271 has 4 divisors (see below), whose sum is σ = 52705969344. Its totient is φ = 50196161200.

The previous prime is 51451065229. The next prime is 51451065283. The reversal of 51451065271 is 17256015415.

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

It is a cyclic number.

It is not a de Polignac number, because 51451065271 - 2⁹ = 51451064759 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 51451065271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451065671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627451975 + ... + 627452056.

It is an arithmetic number, because the mean of its divisors is an integer number (13176492336).

Almost surely, 2^51451065271 is an apocalyptic number.

51451065271 is a deficient number, since it is larger than the sum of its proper divisors (1254904073).

51451065271 is a wasteful number, since it uses less digits than its factorization.

51451065271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254904072.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 51451065271 in words is "fifty-one billion, four hundred fifty-one million, sixty-five thousand, two hundred seventy-one".