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215080 = 23519283
BaseRepresentation
bin110100100000101000
3101221000221
4310200220
523340310
64335424
71554025
oct644050
9357027
10215080
11137658
12a4574
1376b88
145854c
1543ada
hex34828

215080 has 32 divisors (see below), whose sum is σ = 511200. Its totient is φ = 81216.

The previous prime is 215077. The next prime is 215087. The reversal of 215080 is 80512.

It is a happy number.

215080 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215087) 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, 619 + ... + 901.

It is an arithmetic number, because the mean of its divisors is an integer number (15975).

2215080 is an apocalyptic number.

215080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255600).

215080 is an abundant number, since it is smaller than the sum of its proper divisors (296120).

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

215080 is a wasteful number, since it uses less digits than its factorization.

215080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 215080 is about 463.7671829701. The cubic root of 215080 is about 59.9146935859.

Adding to 215080 its reverse (80512), we get a palindrome (295592).

The spelling of 215080 in words is "two hundred fifteen thousand, eighty".

Divisors: 1 2 4 5 8 10 19 20 38 40 76 95 152 190 283 380 566 760 1132 1415 2264 2830 5377 5660 10754 11320 21508 26885 43016 53770 107540 215080