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2222222 = 22394649
BaseRepresentation
bin1000011110100010001110
311011220022112
420132202032
51032102342
6115344022
724613532
oct10364216
94156275
102222222
111288652
128b2012
135ca632
1441bbc2
152dd682
hex21e88e

2222222 has 8 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 1106224.

The previous prime is 2222219. The next prime is 2222239.

It can be divided in two parts, 222222 and 2, that multiplied together give a palindrome (444444).

It is a happy number.

2222222 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

2222222 is a modest number, since divided by 2222 gives 222 as remainder.

2222222 is a nontrivial repdigit in base 10.

It is a plaindrome in base 10.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2222197 and 2222206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 2802.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

22222222 is an apocalyptic number.

2222222 is a deficient number, since it is larger than the sum of its proper divisors (1125778).

2222222 is a wasteful number, since it uses less digits than its factorization.

2222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its digits is 128, while the sum is 14.

The square root of 2222222 is about 1490.7119104643. The cubic root of 2222222 is about 130.4955836891.

The spelling of 2222222 in words is "two million, two hundred twenty-two thousand, two hundred twenty-two".

Divisors: 1 2 239 478 4649 9298 1111111 2222222