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231080 = 23553109
BaseRepresentation
bin111000011010101000
3102201222112
4320122220
524343310
64541452
71651463
oct703250
9381875
10231080
11148683
12b1888
1381245
14602da
1548705
hex386a8

231080 has 32 divisors (see below), whose sum is σ = 534600. Its totient is φ = 89856.

The previous prime is 231079. The next prime is 231107. The reversal of 231080 is 80132.

It can be written as a sum of positive squares in 4 ways, for example, as 217156 + 13924 = 466^2 + 118^2 .

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, 2066 + ... + 2174.

2231080 is an apocalyptic number.

231080 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 231080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267300).

231080 is an abundant number, since it is smaller than the sum of its proper divisors (303520).

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

231080 is a wasteful number, since it uses less digits than its factorization.

231080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 231080 is about 480.7078114614. The cubic root of 231080 is about 61.3650067450.

The spelling of 231080 in words is "two hundred thirty-one thousand, eighty".

Divisors: 1 2 4 5 8 10 20 40 53 106 109 212 218 265 424 436 530 545 872 1060 1090 2120 2180 4360 5777 11554 23108 28885 46216 57770 115540 231080