197421235200 has 1980 divisors, whose sum is σ = 892832375160. Its totient is φ = 42918543360.

The previous prime is 197421235177. The next prime is 197421235283. The reversal of 197421235200 is 2532124791.

197421235200 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 2 + 123 + 520 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 2946585567 + ... + 2946585633.

It is an arithmetic number, because the mean of its divisors is an integer number (450925442).

Almost surely, 2^197421235200 is an apocalyptic number.

197421235200 is a gapful number since it is divisible by the number (10) 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 197421235200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446416187580).

197421235200 is an abundant number, since it is smaller than the sum of its proper divisors (695411139960).

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

197421235200 is a wasteful number, since it uses less digits than its factorization.

197421235200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 197421235200 its reverse (2532124791), we get a palindrome (199953359991).

The spelling of 197421235200 in words is "one hundred ninety-seven billion, four hundred twenty-one million, two hundred thirty-five thousand, two hundred".