51943500001 has 4 divisors (see below), whose sum is σ = 51944001732. Its totient is φ = 51942998272.

The previous prime is 51943499981. The next prime is 51943500013. The reversal of 51943500001 is 10000534915.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 40985597601 + 10957902400 = 202449^2 + 104680^2 .

It is a cyclic number.

It is not a de Polignac number, because 51943500001 - 2⁷ = 51943499873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51943500071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31816 + ... + 323881.

It is an arithmetic number, because the mean of its divisors is an integer number (12986000433).

Almost surely, 2^51943500001 is an apocalyptic number.

It is an amenable number.

51943500001 is a deficient number, since it is larger than the sum of its proper divisors (501731).

51943500001 is a wasteful number, since it uses less digits than its factorization.

51943500001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501730.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 51943500001 in words is "fifty-one billion, nine hundred forty-three million, five hundred thousand, one".