51321002243 has 8 divisors (see below), whose sum is σ = 58660718688. Its totient is φ = 43983321984.

The previous prime is 51321002219. The next prime is 51321002251. The reversal of 51321002243 is 34220012315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51321002243 - 2⁶ = 51321002179 is a prime.

It is a super-2 number, since 2×51321002243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51321002203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454646 + ... + 556187.

It is an arithmetic number, because the mean of its divisors is an integer number (7332589836).

Almost surely, 2^51321002243 is an apocalyptic number.

51321002243 is a deficient number, since it is larger than the sum of its proper divisors (7339716445).

51321002243 is a wasteful number, since it uses less digits than its factorization.

51321002243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018093.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 51321002243 its reverse (34220012315), we get a palindrome (85541014558).

The spelling of 51321002243 in words is "fifty-one billion, three hundred twenty-one million, two thousand, two hundred forty-three".