43197138 has 24 divisors (see below), whose sum is σ = 97061328. Its totient is φ = 14398884.

The previous prime is 43197113. The next prime is 43197139. The reversal of 43197138 is 83179134.

It is a happy number.

43197138 is a `hidden beast` number, since 431 + 97 + 138 = 666.

It is not an unprimeable number, because it can be changed into a prime (43197139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43956 + ... + 44927.

It is an arithmetic number, because the mean of its divisors is an integer number (4044222).

Almost surely, 2^43197138 is an apocalyptic number.

43197138 is an abundant number, since it is smaller than the sum of its proper divisors (53864190).

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

43197138 is an equidigital number, since it uses as much as digits as its factorization.

43197138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88900 (or 88888 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 43197138 is about 6572.4529667393. The cubic root of 43197138 is about 350.8743797674.

The spelling of 43197138 in words is "forty-three million, one hundred ninety-seven thousand, one hundred thirty-eight".