201510216 has 48 divisors (see below), whose sum is σ = 549057600. Its totient is φ = 66763872.

The previous prime is 201510209. The next prime is 201510223. The reversal of 201510216 is 612015102.

It is an interprime number because it is at equal distance from previous prime (201510209) and next prime (201510223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3645 + ... + 20403.

It is an arithmetic number, because the mean of its divisors is an integer number (11438700).

Almost surely, 2^201510216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201510216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274528800).

201510216 is an abundant number, since it is smaller than the sum of its proper divisors (347547384).

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

201510216 is a wasteful number, since it uses less digits than its factorization.

201510216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16938 (or 16931 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 201510216 is about 14195.4294052699. The cubic root of 201510216 is about 586.2718242535.

Adding to 201510216 its reverse (612015102), we get a palindrome (813525318).

The spelling of 201510216 in words is "two hundred one million, five hundred ten thousand, two hundred sixteen".