51635522201 has 4 divisors (see below), whose sum is σ = 51644456832. Its totient is φ = 51626587572.

The previous prime is 51635522189. The next prime is 51635522243. The reversal of 51635522201 is 10222553615.

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 51635522201 - 2⁶ = 51635522137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51635522291) 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, 4458641 + ... + 4470206.

It is an arithmetic number, because the mean of its divisors is an integer number (12911114208).

Almost surely, 2^51635522201 is an apocalyptic number.

It is an amenable number.

51635522201 is a deficient number, since it is larger than the sum of its proper divisors (8934631).

51635522201 is an equidigital number, since it uses as much as digits as its factorization.

51635522201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934630.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 51635522201 in words is "fifty-one billion, six hundred thirty-five million, five hundred twenty-two thousand, two hundred one".