51898219 has 2 divisors, whose sum is σ = 51898220. Its totient is φ = 51898218.

The previous prime is 51898207. The next prime is 51898241. The reversal of 51898219 is 91289815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51898219 - 2¹¹ = 51896171 is a prime.

It is a super-2 number, since 2×51898219² = 5386850270743922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51898019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25949109 + 25949110.

It is an arithmetic number, because the mean of its divisors is an integer number (25949110).

Almost surely, 2^51898219 is an apocalyptic number.

51898219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51898219 is an equidigital number, since it uses as much as digits as its factorization.

51898219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 43.

The square root of 51898219 is about 7204.0418516275. The cubic root of 51898219 is about 373.0074318036.

The spelling of 51898219 in words is "fifty-one million, eight hundred ninety-eight thousand, two hundred nineteen".