201682521 has 16 divisors (see below), whose sum is σ = 299008320. Its totient is φ = 134356320.

The previous prime is 201682483. The next prime is 201682541. The reversal of 201682521 is 125286102.

It is a happy number.

It is not a de Polignac number, because 201682521 - 2¹⁵ = 201649753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (201682541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66586 + ... + 69548.

It is an arithmetic number, because the mean of its divisors is an integer number (18688020).

Almost surely, 2^201682521 is an apocalyptic number.

It is an amenable number.

201682521 is a deficient number, since it is larger than the sum of its proper divisors (97325799).

201682521 is a wasteful number, since it uses less digits than its factorization.

201682521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493 (or 5487 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 201682521 is about 14201.4971393864. The cubic root of 201682521 is about 586.4388774680.

The spelling of 201682521 in words is "two hundred one million, six hundred eighty-two thousand, five hundred twenty-one".