201520218 has 8 divisors (see below), whose sum is σ = 403040448. Its totient is φ = 67173404.

The previous prime is 201520199. The next prime is 201520219. The reversal of 201520218 is 812025102.

It is a happy number.

201520218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

201520218 is an admirable number.

It is a super-2 number, since 2×201520218² = 81220796525535048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201520194 and 201520203.

It is not an unprimeable number, because it can be changed into a prime (201520219) 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, 16793346 + ... + 16793357.

It is an arithmetic number, because the mean of its divisors is an integer number (50380056).

Almost surely, 2^201520218 is an apocalyptic number.

201520218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201520218 is a wasteful number, since it uses less digits than its factorization.

201520218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33586708.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 201520218 is about 14195.7816973917. The cubic root of 201520218 is about 586.2815239996.

The spelling of 201520218 in words is "two hundred one million, five hundred twenty thousand, two hundred eighteen".