51544220353 has 4 divisors (see below), whose sum is σ = 51758097028. Its totient is φ = 51330343680.

The previous prime is 51544220339. The next prime is 51544220363. The reversal of 51544220353 is 35302244515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36554380864 + 14989839489 = 191192^2 + 122433^2 .

It is a cyclic number.

It is not a de Polignac number, because 51544220353 - 2²¹ = 51542123201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51544220323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106937976 + ... + 106938457.

It is an arithmetic number, because the mean of its divisors is an integer number (12939524257).

Almost surely, 2^51544220353 is an apocalyptic number.

It is an amenable number.

51544220353 is a deficient number, since it is larger than the sum of its proper divisors (213876675).

51544220353 is a wasteful number, since it uses less digits than its factorization.

51544220353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213876674.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 51544220353 its reverse (35302244515), we get a palindrome (86846464868).

The spelling of 51544220353 in words is "fifty-one billion, five hundred forty-four million, two hundred twenty thousand, three hundred fifty-three".