51921590911 has 8 divisors (see below), whose sum is σ = 52075736064. Its totient is φ = 51767643480.

The previous prime is 51921590867. The next prime is 51921590951. The reversal of 51921590911 is 11909512915.

It is a happy number.

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 51921590911 - 2¹¹ = 51921588863 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 (51921590951) 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, 485076 + ... + 582358.

It is an arithmetic number, because the mean of its divisors is an integer number (6509467008).

Almost surely, 2^51921590911 is an apocalyptic number.

51921590911 is a deficient number, since it is larger than the sum of its proper divisors (154145153).

51921590911 is a wasteful number, since it uses less digits than its factorization.

51921590911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98861.

The product of its (nonzero) digits is 36450, while the sum is 43.

The spelling of 51921590911 in words is "fifty-one billion, nine hundred twenty-one million, five hundred ninety thousand, nine hundred eleven".