51230393 has 2 divisors, whose sum is σ = 51230394. Its totient is φ = 51230392.

The previous prime is 51230369. The next prime is 51230419. The reversal of 51230393 is 39303215.

It is an a-pointer prime, because the next prime (51230419) can be obtained adding 51230393 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51222649 + 7744 = 7157^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 51230393 - 2¹⁸ = 50968249 is a prime.

It is not a weakly prime, because it can be changed into another prime (51230303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25615196 + 25615197.

It is an arithmetic number, because the mean of its divisors is an integer number (25615197).

Almost surely, 2^51230393 is an apocalyptic number.

It is an amenable number.

51230393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51230393 is an equidigital number, since it uses as much as digits as its factorization.

51230393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 51230393 is about 7157.5409883563. The cubic root of 51230393 is about 371.4005670560.

The spelling of 51230393 in words is "fifty-one million, two hundred thirty thousand, three hundred ninety-three".