51150640321 has 4 divisors (see below), whose sum is σ = 55800698544. Its totient is φ = 46500582100.

The previous prime is 51150640241. The next prime is 51150640339. The reversal of 51150640321 is 12304605115.

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 51150640321 - 2³¹ = 49003156673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51150640321.

It is not an unprimeable number, because it can be changed into a prime (51150640351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2325029095 + ... + 2325029116.

It is an arithmetic number, because the mean of its divisors is an integer number (13950174636).

Almost surely, 2^51150640321 is an apocalyptic number.

It is an amenable number.

51150640321 is a deficient number, since it is larger than the sum of its proper divisors (4650058223).

51150640321 is a wasteful number, since it uses less digits than its factorization.

51150640321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650058222.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 51150640321 in words is "fifty-one billion, one hundred fifty million, six hundred forty thousand, three hundred twenty-one".