201216510 has 48 divisors (see below), whose sum is σ = 570726000. Its totient is φ = 48779520.

The previous prime is 201216497. The next prime is 201216511. The reversal of 201216510 is 15612102.

201216510 is a `hidden beast` number, since 2 + 0 + 12 + 1 + 651 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201216511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100635 + ... + 102614.

It is an arithmetic number, because the mean of its divisors is an integer number (11890125).

Almost surely, 2^201216510 is an apocalyptic number.

201216510 is an abundant number, since it is smaller than the sum of its proper divisors (369509490).

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

201216510 is a wasteful number, since it uses less digits than its factorization.

201216510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203273 (or 203270 counting only the distinct ones).

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

The square root of 201216510 is about 14185.0805425983. The cubic root of 201216510 is about 585.9868506487.

Adding to 201216510 its reverse (15612102), we get a palindrome (216828612).

The spelling of 201216510 in words is "two hundred one million, two hundred sixteen thousand, five hundred ten".