198822751 has 2 divisors, whose sum is σ = 198822752. Its totient is φ = 198822750.

The previous prime is 198822731. The next prime is 198822779. The reversal of 198822751 is 157228891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198822751 - 2¹¹ = 198820703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198822698 and 198822707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198822731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99411375 + 99411376.

It is an arithmetic number, because the mean of its divisors is an integer number (99411376).

Almost surely, 2^198822751 is an apocalyptic number.

198822751 is a deficient number, since it is larger than the sum of its proper divisors (1).

198822751 is an equidigital number, since it uses as much as digits as its factorization.

198822751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 43.

The square root of 198822751 is about 14100.4521558707. The cubic root of 198822751 is about 583.6538565760.

The spelling of 198822751 in words is "one hundred ninety-eight million, eight hundred twenty-two thousand, seven hundred fifty-one".