51544220215 has 8 divisors (see below), whose sum is σ = 61964114400. Its totient is φ = 41161342752.

The previous prime is 51544220191. The next prime is 51544220251. The reversal of 51544220215 is 51202244515.

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 51544220215 - 2¹⁵ = 51544187447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9251115 + ... + 9256684.

It is an arithmetic number, because the mean of its divisors is an integer number (7745514300).

Almost surely, 2^51544220215 is an apocalyptic number.

51544220215 is a deficient number, since it is larger than the sum of its proper divisors (10419894185).

51544220215 is a wasteful number, since it uses less digits than its factorization.

51544220215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18508361.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 51544220215 in words is "fifty-one billion, five hundred forty-four million, two hundred twenty thousand, two hundred fifteen".