51417952249 has 2 divisors, whose sum is σ = 51417952250. Its totient is φ = 51417952248.

The previous prime is 51417952237. The next prime is 51417952253. The reversal of 51417952249 is 94225971415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49889689600 + 1528262649 = 223360^2 + 39093^2 .

It is a cyclic number.

It is not a de Polignac number, because 51417952249 - 2⁷ = 51417952121 is a prime.

It is not a weakly prime, because it can be changed into another prime (51417952219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25708976124 + 25708976125.

It is an arithmetic number, because the mean of its divisors is an integer number (25708976125).

Almost surely, 2^51417952249 is an apocalyptic number.

It is an amenable number.

51417952249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51417952249 is an equidigital number, since it uses as much as digits as its factorization.

51417952249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The spelling of 51417952249 in words is "fifty-one billion, four hundred seventeen million, nine hundred fifty-two thousand, two hundred forty-nine".