198722505 has 16 divisors (see below), whose sum is σ = 319798080. Its totient is φ = 105371328.

The previous prime is 198722483. The next prime is 198722509. The reversal of 198722505 is 505227891.

198722505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198722505 - 2⁶ = 198722441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198722509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35695 + ... + 40884.

It is an arithmetic number, because the mean of its divisors is an integer number (19987380).

Almost surely, 2^198722505 is an apocalyptic number.

198722505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198722505 is a deficient number, since it is larger than the sum of its proper divisors (121075575).

198722505 is a wasteful number, since it uses less digits than its factorization.

198722505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76760.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 198722505 is about 14096.8969989853. The cubic root of 198722505 is about 583.5557477490. Note that the first 3 decimals are identical.

The spelling of 198722505 in words is "one hundred ninety-eight million, seven hundred twenty-two thousand, five hundred five".