51954247 has 2 divisors, whose sum is σ = 51954248. Its totient is φ = 51954246.

The previous prime is 51954241. The next prime is 51954269. The reversal of 51954247 is 74245915.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51954247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51954241) 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, 25977123 + 25977124.

It is an arithmetic number, because the mean of its divisors is an integer number (25977124).

Almost surely, 2^51954247 is an apocalyptic number.

51954247 is the 4162-nd hex number.

51954247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51954247 is an equidigital number, since it uses as much as digits as its factorization.

51954247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 51954247 is about 7207.9294530399. The cubic root of 51954247 is about 373.1416133142.

The spelling of 51954247 in words is "fifty-one million, nine hundred fifty-four thousand, two hundred forty-seven".