198505212 has 12 divisors (see below), whose sum is σ = 463178856. Its totient is φ = 66168400.

The previous prime is 198505211. The next prime is 198505247. The reversal of 198505212 is 212505891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198505211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8271039 + ... + 8271062.

It is an arithmetic number, because the mean of its divisors is an integer number (38598238).

Almost surely, 2^198505212 is an apocalyptic number.

198505212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198505212 is an abundant number, since it is smaller than the sum of its proper divisors (264673644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198505212 is a wasteful number, since it uses less digits than its factorization.

198505212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542108 (or 16542106 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 198505212 is about 14089.1877693499. The cubic root of 198505212 is about 583.3429739540.

The spelling of 198505212 in words is "one hundred ninety-eight million, five hundred five thousand, two hundred twelve".