51254445215 has 4 divisors (see below), whose sum is σ = 61505334264. Its totient is φ = 41003556168.

The previous prime is 51254445211. The next prime is 51254445247.

51254445215 is nontrivially palindromic in base 10.

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 51254445215 - 2² = 51254445211 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 (51254445211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125444517 + ... + 5125444526.

It is an arithmetic number, because the mean of its divisors is an integer number (15376333566).

Almost surely, 2^51254445215 is an apocalyptic number.

51254445215 is a deficient number, since it is larger than the sum of its proper divisors (10250889049).

51254445215 is a wasteful number, since it uses less digits than its factorization.

51254445215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250889048.

The product of its digits is 160000, while the sum is 38.

The spelling of 51254445215 in words is "fifty-one billion, two hundred fifty-four million, four hundred forty-five thousand, two hundred fifteen".