197768216 has 8 divisors (see below), whose sum is σ = 370815420. Its totient is φ = 98884104.

The previous prime is 197768213. The next prime is 197768239. The reversal of 197768216 is 612867791.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×197768216² = 78224534519645312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197768213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12360506 + ... + 12360521.

Almost surely, 2^197768216 is an apocalyptic number.

It is an amenable number.

197768216 is a deficient number, since it is larger than the sum of its proper divisors (173047204).

197768216 is a wasteful number, since it uses less digits than its factorization.

197768216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24721033 (or 24721029 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 197768216 is about 14063.0087819072. The cubic root of 197768216 is about 582.6201472588.

The spelling of 197768216 in words is "one hundred ninety-seven million, seven hundred sixty-eight thousand, two hundred sixteen".