51024012221 has 8 divisors (see below), whose sum is σ = 62798784384. Its totient is φ = 40370646960.

The previous prime is 51024012217. The next prime is 51024012227. The reversal of 51024012221 is 12221042015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51024012221 - 2² = 51024012217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51024012193 and 51024012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51024012227) 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, 280351625 + ... + 280351806.

It is an arithmetic number, because the mean of its divisors is an integer number (7849848048).

Almost surely, 2^51024012221 is an apocalyptic number.

It is an amenable number.

51024012221 is a deficient number, since it is larger than the sum of its proper divisors (11774772163).

51024012221 is a wasteful number, since it uses less digits than its factorization.

51024012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560703451.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 51024012221 its reverse (12221042015), we get a palindrome (63245054236).

The spelling of 51024012221 in words is "fifty-one billion, twenty-four million, twelve thousand, two hundred twenty-one".