198522061 has 2 divisors, whose sum is σ = 198522062. Its totient is φ = 198522060.

The previous prime is 198522059. The next prime is 198522083. The reversal of 198522061 is 160225891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135001161 + 63520900 = 11619^2 + 7970^2 .

It is a cyclic number.

It is not a de Polignac number, because 198522061 - 2¹ = 198522059 is a prime.

It is a super-2 number, since 2×198522061² = 78822017407375442, which contains 22 as substring.

Together with 198522059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198522001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99261030 + 99261031.

It is an arithmetic number, because the mean of its divisors is an integer number (99261031).

Almost surely, 2^198522061 is an apocalyptic number.

It is an amenable number.

198522061 is a deficient number, since it is larger than the sum of its proper divisors (1).

198522061 is an equidigital number, since it uses as much as digits as its factorization.

198522061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 198522061 is about 14089.7856974476. The cubic root of 198522061 is about 583.3594780844.

It can be divided in two parts, 1985220 and 61, that added together give a square (1985281 = 1409²).

The spelling of 198522061 in words is "one hundred ninety-eight million, five hundred twenty-two thousand, sixty-one".