201515 has 8 divisors (see below), whose sum is σ = 247968. Its totient is φ = 157120.

The previous prime is 201511. The next prime is 201517. The reversal of 201515 is 515102.

201515 = 67² + 68² + ... + 96².

201515 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 201515 - 2² = 201511 is a prime.

201515 is a modest number, since divided by 1515 gives 20 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 201515.

It is not an unprimeable number, because it can be changed into a prime (201511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (30996).

2²⁰¹⁵¹⁵ is an apocalyptic number.

201515 is a deficient number, since it is larger than the sum of its proper divisors (46453).

201515 is an equidigital number, since it uses as much as digits as its factorization.

201515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 201515 is about 448.9042214103. The cubic root of 201515 is about 58.6276463724.

Adding to 201515 its reverse (515102), we get a palindrome (716617).

The spelling of 201515 in words is "two hundred one thousand, five hundred fifteen".