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222449 = 1811229
BaseRepresentation
bin110110010011110001
3102022010212
4312103301
524104244
64433505
71614353
oct662361
9368125
10222449
11142147
12a8895
137a336
145b0d3
1545d9e
hex364f1

222449 has 4 divisors (see below), whose sum is σ = 223860. Its totient is φ = 221040.

The previous prime is 222437. The next prime is 222461. The reversal of 222449 is 944222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944222 = 2472111.

It is an interprime number because it is at equal distance from previous prime (222437) and next prime (222461).

It can be written as a sum of positive squares in 2 ways, for example, as 110224 + 112225 = 332^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 222449 - 28 = 222193 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222419) 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, 434 + ... + 795.

It is an arithmetic number, because the mean of its divisors is an integer number (55965).

2222449 is an apocalyptic number.

It is an amenable number.

222449 is a deficient number, since it is larger than the sum of its proper divisors (1411).

222449 is a wasteful number, since it uses less digits than its factorization.

222449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its digits is 1152, while the sum is 23.

The square root of 222449 is about 471.6449936128. The cubic root of 222449 is about 60.5912835514.

The spelling of 222449 in words is "two hundred twenty-two thousand, four hundred forty-nine".

Divisors: 1 181 1229 222449