51530321983 has 16 divisors (see below), whose sum is σ = 60339603456. Its totient is φ = 43085659680.

The previous prime is 51530321939. The next prime is 51530322007. The reversal of 51530321983 is 38912303515.

It is not a de Polignac number, because 51530321983 - 2⁹ = 51530321471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530321483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121938 + ... + 343408.

It is an arithmetic number, because the mean of its divisors is an integer number (3771225216).

Almost surely, 2^51530321983 is an apocalyptic number.

51530321983 is a deficient number, since it is larger than the sum of its proper divisors (8809281473).

51530321983 is a wasteful number, since it uses less digits than its factorization.

51530321983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222294.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 51530321983 in words is "fifty-one billion, five hundred thirty million, three hundred twenty-one thousand, nine hundred eighty-three".