100218157 has 4 divisors (see below), whose sum is σ = 107927260. Its totient is φ = 92509056.

The previous prime is 100218149. The next prime is 100218161. The reversal of 100218157 is 751812001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751812001 = 397 ⋅1893733.

It can be written as a sum of positive squares in 2 ways, for example, as 66275881 + 33942276 = 8141^2 + 5826^2 .

It is a cyclic number.

It is not a de Polignac number, because 100218157 - 2³ = 100218149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100218127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3854532 + ... + 3854557.

It is an arithmetic number, because the mean of its divisors is an integer number (26981815).

Almost surely, 2^100218157 is an apocalyptic number.

It is an amenable number.

100218157 is a deficient number, since it is larger than the sum of its proper divisors (7709103).

100218157 is an equidigital number, since it uses as much as digits as its factorization.

100218157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709102.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 100218157 is about 10010.9019074207. The cubic root of 100218157 is about 464.4961699070.

The spelling of 100218157 in words is "one hundred million, two hundred eighteen thousand, one hundred fifty-seven".