51200231221 has 8 divisors (see below), whose sum is σ = 52671830400. Its totient is φ = 49733253648.

The previous prime is 51200231213. The next prime is 51200231227. The reversal of 51200231221 is 12213200215.

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 51200231221 - 2³ = 51200231213 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 (51200231227) 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, 1132921 + ... + 1177246.

It is an arithmetic number, because the mean of its divisors is an integer number (6583978800).

Almost surely, 2^51200231221 is an apocalyptic number.

It is an amenable number.

51200231221 is a deficient number, since it is larger than the sum of its proper divisors (1471599179).

51200231221 is a wasteful number, since it uses less digits than its factorization.

51200231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310803.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 51200231221 its reverse (12213200215), we get a palindrome (63413431436).

The spelling of 51200231221 in words is "fifty-one billion, two hundred million, two hundred thirty-one thousand, two hundred twenty-one".