197881216 has 64 divisors (see below), whose sum is σ = 428828400. Its totient is φ = 90408960.

The previous prime is 197881169. The next prime is 197881223. The reversal of 197881216 is 612188791.

It is a happy number.

197881216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180831 + ... + 181921.

Almost surely, 2^197881216 is an apocalyptic number.

197881216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197881216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214414200).

197881216 is an abundant number, since it is smaller than the sum of its proper divisors (230947184).

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

197881216 is a wasteful number, since it uses less digits than its factorization.

197881216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1215 counting only the distinct ones).

The product of its digits is 48384, while the sum is 43.

The square root of 197881216 is about 14067.0258405962. The cubic root of 197881216 is about 582.7310911757.

The spelling of 197881216 in words is "one hundred ninety-seven million, eight hundred eighty-one thousand, two hundred sixteen".