51343248837221 has 8 divisors (see below), whose sum is σ = 56011297209600. Its totient is φ = 46675280514240.

The previous prime is 51343248837193. The next prime is 51343248837227. The reversal of 51343248837221 is 12273884234315.

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 51343248837221 - 2⁶ = 51343248837157 is a prime.

It is a super-2 number, since 2×51343248837221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343248837227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18667316 + ... + 21240413.

It is an arithmetic number, because the mean of its divisors is an integer number (7001412151200).

Almost surely, 2^{51343248837221} is an apocalyptic number.

It is an amenable number.

51343248837221 is a deficient number, since it is larger than the sum of its proper divisors (4668048372379).

51343248837221 is a wasteful number, since it uses less digits than its factorization.

51343248837221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40024699.

The product of its digits is 7741440, while the sum is 53.

The spelling of 51343248837221 in words is "fifty-one trillion, three hundred forty-three billion, two hundred forty-eight million, eight hundred thirty-seven thousand, two hundred twenty-one".