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221000222 = 2110500111
BaseRepresentation
bin11010010110000…
…11001000011110
3120101211222022102
431023003020132
5423034001342
633532445102
75322320342
oct1513031036
9511758272
10221000222
11103826813
1262019792
1336a2aa81
14214cb622
1514606832
hexd2c321e

221000222 has 4 divisors (see below), whose sum is σ = 331500336. Its totient is φ = 110500110.

The previous prime is 221000141. The next prime is 221000243. The reversal of 221000222 is 222000122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222000122 = 2111000061.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 55250054 + ... + 55250057.

It is an arithmetic number, because the mean of its divisors is an integer number (82875084).

Almost surely, 2221000222 is an apocalyptic number.

221000222 is a deficient number, since it is larger than the sum of its proper divisors (110500114).

221000222 is a wasteful number, since it uses less digits than its factorization.

221000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110500113.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 221000222 is about 14866.0762139846. The cubic root of 221000222 is about 604.5945620445.

Adding to 221000222 its reverse (222000122), we get a palindrome (443000344).

The spelling of 221000222 in words is "two hundred twenty-one million, two hundred twenty-two", and thus it is an aban number.

Divisors: 1 2 110500111 221000222