215105 has 8 divisors (see below), whose sum is σ = 281664. Its totient is φ = 156400.

The previous prime is 215087. The next prime is 215123. The reversal of 215105 is 501512.

It is an interprime number because it is at equal distance from previous prime (215087) and next prime (215123).

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

It is not a de Polignac number, because 215105 - 2⁸ = 214849 is a prime.

It is a super-2 number, since 2×215105² = 92540322050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1901 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (35208).

2²¹⁵¹⁰⁵ is an apocalyptic number.

It is an amenable number.

215105 is a deficient number, since it is larger than the sum of its proper divisors (66559).

215105 is a wasteful number, since it uses less digits than its factorization.

215105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927.

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

The square root of 215105 is about 463.7941353661. The cubic root of 215105 is about 59.9170149071.

Adding to 215105 its reverse (501512), we get a palindrome (716617).

The spelling of 215105 in words is "two hundred fifteen thousand, one hundred five".