197550 has 36 divisors (see below), whose sum is σ = 531960. Its totient is φ = 52560.

The previous prime is 197539. The next prime is 197551. The reversal of 197550 is 55791.

197550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197551) by changing a digit.

197550 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 231 + ... + 669.

2¹⁹⁷⁵⁵⁰ is an apocalyptic number.

197550 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 197550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265980).

197550 is an abundant number, since it is smaller than the sum of its proper divisors (334410).

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

197550 is a wasteful number, since it uses less digits than its factorization.

197550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 197550 is about 444.4659717009. The cubic root of 197550 is about 58.2405782130.

It can be divided in two parts, 1975 and 50, that added together give a square (2025 = 45²).

The spelling of 197550 in words is "one hundred ninety-seven thousand, five hundred fifty".