51022321 has 8 divisors (see below), whose sum is σ = 61741440. Its totient is φ = 41160768.

The previous prime is 51022319. The next prime is 51022343. The reversal of 51022321 is 12322015.

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 51022321 - 2¹ = 51022319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51022295 and 51022304.

It is not an unprimeable number, because it can be changed into a prime (51022421) 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, 214261 + ... + 214498.

It is an arithmetic number, because the mean of its divisors is an integer number (7717680).

Almost surely, 2^51022321 is an apocalyptic number.

It is an amenable number.

51022321 is a deficient number, since it is larger than the sum of its proper divisors (10719119).

51022321 is a wasteful number, since it uses less digits than its factorization.

51022321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428783.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51022321 is about 7142.9910401736. The cubic root of 51022321 is about 370.8970709055.

Adding to 51022321 its reverse (12322015), we get a palindrome (63344336).

The spelling of 51022321 in words is "fifty-one million, twenty-two thousand, three hundred twenty-one".