51430321 has 8 divisors (see below), whose sum is σ = 57322080. Its totient is φ = 45857088.

The previous prime is 51430319. The next prime is 51430349. The reversal of 51430321 is 12303415.

51430321 = T₅₈₅₄ + T₅₈₅₅ + T₅₈₅₆.

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 51430321 - 2¹ = 51430319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51430391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79291 + ... + 79936.

It is an arithmetic number, because the mean of its divisors is an integer number (7165260).

Almost surely, 2^51430321 is an apocalyptic number.

51430321 is the 5856-th centered triangular number.

It is an amenable number.

51430321 is a deficient number, since it is larger than the sum of its proper divisors (5891759).

51430321 is a wasteful number, since it uses less digits than its factorization.

51430321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159263.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 51430321 is about 7171.4936380088. The cubic root of 51430321 is about 371.8830735342.

Adding to 51430321 its reverse (12303415), we get a palindrome (63733736).

The spelling of 51430321 in words is "fifty-one million, four hundred thirty thousand, three hundred twenty-one".