51052321 has 2 divisors, whose sum is σ = 51052322. Its totient is φ = 51052320.

The previous prime is 51052291. The next prime is 51052327. The reversal of 51052321 is 12325015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 1296 = 7145^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 51052321 - 2⁹ = 51051809 is a prime.

It is not a weakly prime, because it can be changed into another prime (51052327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25526160 + 25526161.

It is an arithmetic number, because the mean of its divisors is an integer number (25526161).

Almost surely, 2^51052321 is an apocalyptic number.

It is an amenable number.

51052321 is a deficient number, since it is larger than the sum of its proper divisors (1).

51052321 is an equidigital number, since it uses as much as digits as its factorization.

51052321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51052321 is about 7145.0906922166. The cubic root of 51052321 is about 370.9697497634.

Adding to 51052321 its reverse (12325015), we get a palindrome (63377336).

The spelling of 51052321 in words is "fifty-one million, fifty-two thousand, three hundred twenty-one".