198271553 has 2 divisors, whose sum is σ = 198271554. Its totient is φ = 198271552.

The previous prime is 198271543. The next prime is 198271603. The reversal of 198271553 is 355172891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133356304 + 64915249 = 11548^2 + 8057^2 .

It is a cyclic number.

It is not a de Polignac number, because 198271553 - 2¹² = 198267457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198271553.

It is not a weakly prime, because it can be changed into another prime (198271543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99135776 + 99135777.

It is an arithmetic number, because the mean of its divisors is an integer number (99135777).

Almost surely, 2^198271553 is an apocalyptic number.

It is an amenable number.

198271553 is a deficient number, since it is larger than the sum of its proper divisors (1).

198271553 is an equidigital number, since it uses as much as digits as its factorization.

198271553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 41.

The square root of 198271553 is about 14080.8931889991. The cubic root of 198271553 is about 583.1140012063.

The spelling of 198271553 in words is "one hundred ninety-eight million, two hundred seventy-one thousand, five hundred fifty-three".