51244217 has 2 divisors, whose sum is σ = 51244218. Its totient is φ = 51244216.

The previous prime is 51244199. The next prime is 51244243. The reversal of 51244217 is 71244215.

It is an a-pointer prime, because the next prime (51244243) can be obtained adding 51244217 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., 47004736 + 4239481 = 6856^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 51244217 - 2¹⁰ = 51243193 is a prime.

It is not a weakly prime, because it can be changed into another prime (51244517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622108 + 25622109.

It is an arithmetic number, because the mean of its divisors is an integer number (25622109).

Almost surely, 2^51244217 is an apocalyptic number.

It is an amenable number.

51244217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51244217 is an equidigital number, since it uses as much as digits as its factorization.

51244217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 26.

The square root of 51244217 is about 7158.5066180035. The cubic root of 51244217 is about 371.4339702723.

The spelling of 51244217 in words is "fifty-one million, two hundred forty-four thousand, two hundred seventeen".