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211230 = 23252347
BaseRepresentation
bin110011100100011110
3101201202100
4303210132
523224410
64305530
71536555
oct634436
9351670
10211230
11134778
12a22a6
13751b6
1456d9c
15428c0
hex3391e

211230 has 24 divisors (see below), whose sum is σ = 549432. Its totient is φ = 56304.

The previous prime is 211229. The next prime is 211231. The reversal of 211230 is 32112.

It is a happy number.

211230 is nontrivially palindromic in base 8.

It is an interprime number because it is at equal distance from previous prime (211229) and next prime (211231).

It is a super-2 number, since 2×2112302 = 89236225800, which contains 22 as substring.

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

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231) 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, 1084 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (22893).

2211230 is an apocalyptic number.

211230 is an abundant number, since it is smaller than the sum of its proper divisors (338202).

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

211230 is a wasteful number, since it uses less digits than its factorization.

211230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 211230 is about 459.5976501245. The cubic root of 211230 is about 59.5550416921. Note that the first 3 decimals are identical.

Adding to 211230 its reverse (32112), we get a palindrome (243342).

It can be divided in two parts, 211 and 230, that added together give a square (441 = 212).

The spelling of 211230 in words is "two hundred eleven thousand, two hundred thirty".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 2347 4694 7041 11735 14082 21123 23470 35205 42246 70410 105615 211230