51444152300221 has 4 divisors (see below), whose sum is σ = 51469088876352. Its totient is φ = 51419215724092.

The previous prime is 51444152300117. The next prime is 51444152300279. The reversal of 51444152300221 is 12200325144415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51444152300221 - 2²⁹ = 51443615429309 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 (51444152303221) 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, 12468284971 + ... + 12468289096.

It is an arithmetic number, because the mean of its divisors is an integer number (12867272219088).

Almost surely, 2^{51444152300221} is an apocalyptic number.

It is an amenable number.

51444152300221 is a deficient number, since it is larger than the sum of its proper divisors (24936576131).

51444152300221 is a wasteful number, since it uses less digits than its factorization.

51444152300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24936576130.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 51444152300221 its reverse (12200325144415), we get a palindrome (63644477444636).

The spelling of 51444152300221 in words is "fifty-one trillion, four hundred forty-four billion, one hundred fifty-two million, three hundred thousand, two hundred twenty-one".