198151571 has 2 divisors, whose sum is σ = 198151572. Its totient is φ = 198151570.

The previous prime is 198151567. The next prime is 198151573. The reversal of 198151571 is 175151891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198151571 - 2² = 198151567 is a prime.

It is a Sophie Germain prime.

Together with 198151573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198151573) 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, 99075785 + 99075786.

It is an arithmetic number, because the mean of its divisors is an integer number (99075786).

Almost surely, 2^198151571 is an apocalyptic number.

198151571 is a deficient number, since it is larger than the sum of its proper divisors (1).

198151571 is an equidigital number, since it uses as much as digits as its factorization.

198151571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 38.

The square root of 198151571 is about 14076.6320900988. The cubic root of 198151571 is about 582.9963556502.

The spelling of 198151571 in words is "one hundred ninety-eight million, one hundred fifty-one thousand, five hundred seventy-one".