195983550 has 240 divisors, whose sum is σ = 645292032. Its totient is φ = 43156800.

The previous prime is 195983549. The next prime is 195983563. The reversal of 195983550 is 55389591.

195983550 is a `hidden beast` number, since 1 + 9 + 5 + 98 + 3 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 195983496 and 195983505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 878739 + ... + 878961.

Almost surely, 2^195983550 is an apocalyptic number.

195983550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195983550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322646016).

195983550 is an abundant number, since it is smaller than the sum of its proper divisors (449308482).

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

195983550 is a wasteful number, since it uses less digits than its factorization.

195983550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The square root of 195983550 is about 13999.4124876725. The cubic root of 195983550 is about 580.8623221321.

The spelling of 195983550 in words is "one hundred ninety-five million, nine hundred eighty-three thousand, five hundred fifty".