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2223313131 = 313213732009
BaseRepresentation
bin1000010010000101…
…0001000011101011
312201221120000020210
42010201101003223
514023132010011
61004341152203
7106044564324
oct20441210353
95657500223
102223313131
11a41003076
125206bb663
13295804b00
141713c944b
15d02c46a6
hex848510eb

2223313131 has 24 divisors (see below), whose sum is σ = 3233522160. Its totient is φ = 1358163456.

The previous prime is 2223313129. The next prime is 2223313223. The reversal of 2223313131 is 1313133222.

It is not a de Polignac number, because 2223313131 - 21 = 2223313129 is a prime.

It is a super-2 number, since 2×22233131312 = 9886242556954046322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2223313098 and 2223313107.

It is not an unprimeable number, because it can be changed into a prime (2223313121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53455 + ... + 85463.

It is an arithmetic number, because the mean of its divisors is an integer number (134730090).

Almost surely, 22223313131 is an apocalyptic number.

2223313131 is a deficient number, since it is larger than the sum of its proper divisors (1010209029).

2223313131 is a wasteful number, since it uses less digits than its factorization.

2223313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32175 (or 32162 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 2223313131 is about 47152.0214943114. The cubic root of 2223313131 is about 1305.1693836302.

Adding to 2223313131 its reverse (1313133222), we get a palindrome (3536446353).

The spelling of 2223313131 in words is "two billion, two hundred twenty-three million, three hundred thirteen thousand, one hundred thirty-one".

Divisors: 1 3 13 39 137 169 411 507 1781 5343 23153 32009 69459 96027 416117 1248351 4385233 5409521 13155699 16228563 57008029 171024087 741104377 2223313131