51200321 has 4 divisors (see below), whose sum is σ = 51226500. Its totient is φ = 51174144.

The previous prime is 51200309. The next prime is 51200329. The reversal of 51200321 is 12300215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12300215 = 5 ⋅2460043.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 32364721 = 4340^2 + 5689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51200321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51200296 and 51200305.

It is not an unprimeable number, because it can be changed into a prime (51200329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9896 + ... + 14153.

It is an arithmetic number, because the mean of its divisors is an integer number (12806625).

Almost surely, 2^51200321 is an apocalyptic number.

It is an amenable number.

51200321 is a deficient number, since it is larger than the sum of its proper divisors (26179).

51200321 is a wasteful number, since it uses less digits than its factorization.

51200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26178.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51200321 is about 7155.4399585211. The cubic root of 51200321 is about 371.3278827030.

Adding to 51200321 its reverse (12300215), we get a palindrome (63500536).

The spelling of 51200321 in words is "fifty-one million, two hundred thousand, three hundred twenty-one".