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231136 = 2531233
BaseRepresentation
bin111000011011100000
3102202001121
4320123200
524344021
64542024
71651603
oct703340
9382047
10231136
11148724
12b1914
1381289
146033a
1548741
hex386e0

231136 has 24 divisors (see below), whose sum is σ = 471744. Its totient is φ = 111360.

The previous prime is 231131. The next prime is 231169. The reversal of 231136 is 631132.

231136 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2231136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235872).

231136 is an abundant number, since it is smaller than the sum of its proper divisors (240608).

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

231136 is a wasteful number, since it uses less digits than its factorization.

231136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 266 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 231136 is about 480.7660553741. The cubic root of 231136 is about 61.3699634163.

Adding to 231136 its reverse (631132), we get a palindrome (862268).

The spelling of 231136 in words is "two hundred thirty-one thousand, one hundred thirty-six".

Divisors: 1 2 4 8 16 31 32 62 124 233 248 466 496 932 992 1864 3728 7223 7456 14446 28892 57784 115568 231136