51665102201 has 8 divisors (see below), whose sum is σ = 51739569408. Its totient is φ = 51590682000.

The previous prime is 51665102191. The next prime is 51665102227. The reversal of 51665102201 is 10220156615.

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 a de Polignac number, because none of the positive numbers 2^k-51665102201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51665002201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2587466 + ... + 2607356.

It is an arithmetic number, because the mean of its divisors is an integer number (6467446176).

Almost surely, 2^51665102201 is an apocalyptic number.

It is an amenable number.

51665102201 is a deficient number, since it is larger than the sum of its proper divisors (74467207).

51665102201 is a wasteful number, since it uses less digits than its factorization.

51665102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23503.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 51665102201 its reverse (10220156615), we get a palindrome (61885258816).

The spelling of 51665102201 in words is "fifty-one billion, six hundred sixty-five million, one hundred two thousand, two hundred one".