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222490 = 25191171
BaseRepresentation
bin110110010100011010
3102022012101
4312110122
524104430
64434014
71614442
oct662432
9368171
10222490
11142184
12a890a
137a368
145b122
1545dca
hex3651a

222490 has 16 divisors (see below), whose sum is σ = 421920. Its totient is φ = 84240.

The previous prime is 222461. The next prime is 222493. The reversal of 222490 is 94222.

It is a happy number.

222490 is digitally balanced in base 2 and base 3, because in such bases 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 (19).

It is not an unprimeable number, because it can be changed into a prime (222493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 775.

It is an arithmetic number, because the mean of its divisors is an integer number (26370).

2222490 is an apocalyptic number.

222490 is a deficient number, since it is larger than the sum of its proper divisors (199430).

222490 is a wasteful number, since it uses less digits than its factorization.

222490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 222490 is about 471.6884565049. The cubic root of 222490 is about 60.5950058878.

Adding to 222490 its product of nonzero digits (288), we get a triangular number (222778 = T667).

The spelling of 222490 in words is "two hundred twenty-two thousand, four hundred ninety".

Divisors: 1 2 5 10 19 38 95 190 1171 2342 5855 11710 22249 44498 111245 222490