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212399 = 1119309
BaseRepresentation
bin110011110110101111
3101210100122
4303312233
523244044
64315155
71543145
oct636657
9353318
10212399
11135640
12a2abb
13758a5
1457595
1542dee
hex33daf

212399 has 4 divisors (see below), whose sum is σ = 231720. Its totient is φ = 193080.

The previous prime is 212383. The next prime is 212411. The reversal of 212399 is 993212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212399 - 24 = 212383 is a prime.

It is a super-2 number, since 2×2123992 = 90226670402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9644 + ... + 9665.

It is an arithmetic number, because the mean of its divisors is an integer number (57930).

2212399 is an apocalyptic number.

212399 is a deficient number, since it is larger than the sum of its proper divisors (19321).

212399 is a wasteful number, since it uses less digits than its factorization.

212399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320.

The product of its digits is 972, while the sum is 26.

The square root of 212399 is about 460.8676599632. The cubic root of 212399 is about 59.6647038391.

It can be divided in two parts, 2123 and 99, that added together give a palindrome (2222).

The spelling of 212399 in words is "two hundred twelve thousand, three hundred ninety-nine".

Divisors: 1 11 19309 212399