51550244205515 has 16 divisors (see below), whose sum is σ = 67897968062976. Its totient is φ = 37261080021600.

The previous prime is 51550244205497. The next prime is 51550244205517.

It is a happy number.

51550244205515 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-51550244205515 is a prime.

It is a super-4 number, since 4×51550244205515⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51550244205517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2875074371 + ... + 2875092300.

It is an arithmetic number, because the mean of its divisors is an integer number (4243623003936).

Almost surely, 2^{51550244205515} is an apocalyptic number.

51550244205515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51550244205515 is a deficient number, since it is larger than the sum of its proper divisors (16347723857461).

51550244205515 is a wasteful number, since it uses less digits than its factorization.

51550244205515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750166850.

The product of its (nonzero) digits is 1000000, while the sum is 44.

The spelling of 51550244205515 in words is "fifty-one trillion, five hundred fifty billion, two hundred forty-four million, two hundred five thousand, five hundred fifteen".