651054312321 has 16 divisors (see below), whose sum is σ = 998741040000. Its totient is φ = 369534181248.

The previous prime is 651054312301. The next prime is 651054312361. The reversal of 651054312321 is 123213450156.

It is not a de Polignac number, because 651054312321 - 2⁵ = 651054312289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651054312301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104032396 + ... + 104038653.

It is an arithmetic number, because the mean of its divisors is an integer number (62421315000).

Almost surely, 2^651054312321 is an apocalyptic number.

It is an amenable number.

651054312321 is a deficient number, since it is larger than the sum of its proper divisors (347686727679).

651054312321 is a wasteful number, since it uses less digits than its factorization.

651054312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208071208.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 651054312321 its reverse (123213450156), we get a palindrome (774267762477).

The spelling of 651054312321 in words is "six hundred fifty-one billion, fifty-four million, three hundred twelve thousand, three hundred twenty-one".