51023252321 has 4 divisors (see below), whose sum is σ = 51030368772. Its totient is φ = 51016135872.

The previous prime is 51023252281. The next prime is 51023252323. The reversal of 51023252321 is 12325232015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36965830225 + 14057422096 = 192265^2 + 118564^2 .

It is a cyclic number.

It is not a de Polignac number, because 51023252321 - 2¹⁴ = 51023235937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51023252323) 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, 3547460 + ... + 3561813.

It is an arithmetic number, because the mean of its divisors is an integer number (12757592193).

Almost surely, 2^51023252321 is an apocalyptic number.

It is an amenable number.

51023252321 is a deficient number, since it is larger than the sum of its proper divisors (7116451).

51023252321 is an equidigital number, since it uses as much as digits as its factorization.

51023252321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116450.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 51023252321 its reverse (12325232015), we get a palindrome (63348484336).

The spelling of 51023252321 in words is "fifty-one billion, twenty-three million, two hundred fifty-two thousand, three hundred twenty-one".