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BaseRepresentation
bin10011111100111
3112000100
42133213
5311330
6115143
741532
oct23747
915010
1010215
117747
125ab3
13485a
143a19
153060
hex27e7

10215 has 12 divisors (see below), whose sum is σ = 17784. Its totient is φ = 5424.

The previous prime is 10211. The next prime is 10223. The reversal of 10215 is 51201.

10215 = 143 + 153 + 163.

It is a happy number.

It is not a de Polignac number, because 10215 - 22 = 10211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10197 and 10206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69 + ... + 158.

It is an arithmetic number, because the mean of its divisors is an integer number (1482).

210215 is an apocalyptic number.

10215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10215 is a deficient number, since it is larger than the sum of its proper divisors (7569).

10215 is a wasteful number, since it uses less digits than its factorization.

10215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 10215 is about 101.0692831675. The cubic root of 10215 is about 21.6976545420.

Adding to 10215 its reverse (51201), we get a palindrome (61416).

It can be divided in two parts, 10 and 215, that added together give a square (225 = 152).

The spelling of 10215 in words is "ten thousand, two hundred fifteen".

Divisors: 1 3 5 9 15 45 227 681 1135 2043 3405 10215