51234321 has 8 divisors (see below), whose sum is σ = 68364000. Its totient is φ = 34130432.

The previous prime is 51234299. The next prime is 51234343. The reversal of 51234321 is 12343215.

It is an interprime number because it is at equal distance from previous prime (51234299) and next prime (51234343).

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 51234321 - 2⁶ = 51234257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51234121) 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, 1200 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (8545500).

Almost surely, 2^51234321 is an apocalyptic number.

It is an amenable number.

51234321 is a deficient number, since it is larger than the sum of its proper divisors (17129679).

51234321 is a wasteful number, since it uses less digits than its factorization.

51234321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895.

The product of its digits is 720, while the sum is 21.

The square root of 51234321 is about 7157.8153790106. The cubic root of 51234321 is about 371.4100589745.

Adding to 51234321 its reverse (12343215), we get a palindrome (63577536).

The spelling of 51234321 in words is "fifty-one million, two hundred thirty-four thousand, three hundred twenty-one".