100397218 has 4 divisors (see below), whose sum is σ = 150595830. Its totient is φ = 50198608.

The previous prime is 100397207. The next prime is 100397237. The reversal of 100397218 is 812793001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 95121009 + 5276209 = 9753^2 + 2297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100397218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25099303 + ... + 25099306.

Almost surely, 2^100397218 is an apocalyptic number.

100397218 is a deficient number, since it is larger than the sum of its proper divisors (50198612).

100397218 is an equidigital number, since it uses as much as digits as its factorization.

100397218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50198611.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 100397218 is about 10019.8412163068. The cubic root of 100397218 is about 464.7726456302.

The spelling of 100397218 in words is "one hundred million, three hundred ninety-seven thousand, two hundred eighteen".