197531136 has 200 divisors, whose sum is σ = 644661864. Its totient is φ = 59719680.

The previous prime is 197531111. The next prime is 197531137. The reversal of 197531136 is 631135791.

197531136 is a `hidden beast` number, since 1 + 97 + 531 + 1 + 36 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 197531136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197531137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 455976 + ... + 456408.

Almost surely, 2^197531136 is an apocalyptic number.

197531136 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 197531136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322330932).

197531136 is an abundant number, since it is smaller than the sum of its proper divisors (447130728).

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

197531136 is an equidigital number, since it uses as much as digits as its factorization.

197531136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 449 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 197531136 is about 14054.5770480652. The cubic root of 197531136 is about 582.3872436122.

The spelling of 197531136 in words is "one hundred ninety-seven million, five hundred thirty-one thousand, one hundred thirty-six".