51256193 has 2 divisors, whose sum is σ = 51256194. Its totient is φ = 51256192.

The previous prime is 51256189. The next prime is 51256201. The reversal of 51256193 is 39165215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32001649 + 19254544 = 5657^2 + 4388^2 .

It is a cyclic number.

It is not a de Polignac number, because 51256193 - 2² = 51256189 is a prime.

It is not a weakly prime, because it can be changed into another prime (51256393) 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 as a sum of consecutive naturals, namely, 25628096 + 25628097.

It is an arithmetic number, because the mean of its divisors is an integer number (25628097).

Almost surely, 2^51256193 is an apocalyptic number.

It is an amenable number.

51256193 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256193 is an equidigital number, since it uses as much as digits as its factorization.

51256193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 51256193 is about 7159.3430564543. The cubic root of 51256193 is about 371.4629032720.

The spelling of 51256193 in words is "fifty-one million, two hundred fifty-six thousand, one hundred ninety-three".