51118849 has 2 divisors, whose sum is σ = 51118850. Its totient is φ = 51118848.

The previous prime is 51118829. The next prime is 51118853. The reversal of 51118849 is 94881115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45805824 + 5313025 = 6768^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 51118849 - 2⁵ = 51118817 is a prime.

It is a super-2 number, since 2×51118849² = 5226273446169602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51118829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25559424 + 25559425.

It is an arithmetic number, because the mean of its divisors is an integer number (25559425).

Almost surely, 2^51118849 is an apocalyptic number.

It is an amenable number.

51118849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51118849 is an equidigital number, since it uses as much as digits as its factorization.

51118849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 37.

The square root of 51118849 is about 7149.7446807561. The cubic root of 51118849 is about 371.1308208789.

The spelling of 51118849 in words is "fifty-one million, one hundred eighteen thousand, eight hundred forty-nine".