9782198251 has 12 divisors (see below), whose sum is σ = 11390077440. Its totient is φ = 8376794160.

The previous prime is 9782198243. The next prime is 9782198281. The reversal of 9782198251 is 1528912879.

It is not a de Polignac number, because 9782198251 - 2³ = 9782198243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9782198201) 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 in 11 ways as a sum of consecutive naturals, for example, 42091 + ... + 146068.

It is an arithmetic number, because the mean of its divisors is an integer number (949173120).

Almost surely, 2^9782198251 is an apocalyptic number.

9782198251 is a deficient number, since it is larger than the sum of its proper divisors (1607879189).

9782198251 is a wasteful number, since it uses less digits than its factorization.

9782198251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189234 (or 189227 counting only the distinct ones).

The product of its digits is 725760, while the sum is 52.

The square root of 9782198251 is about 98904.9960871543. The cubic root of 9782198251 is about 2138.6784173480.

The spelling of 9782198251 in words is "nine billion, seven hundred eighty-two million, one hundred ninety-eight thousand, two hundred fifty-one".