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33243413 = 72678437
BaseRepresentation
bin111111011010…
…0000100010101
32022112221101112
41332310010111
532002242123
63144304405
7552364400
oct176640425
968487345
1033243413
11178462a5
12b172105
136b6c378
1445b4d37
152db9d78
hex1fb4115

33243413 has 6 divisors (see below), whose sum is σ = 38670966. Its totient is φ = 28494312.

The previous prime is 33243403. The next prime is 33243421. The reversal of 33243413 is 31434233.

Adding to 33243413 its reverse (31434233), we get a palindrome (64677646).

It can be written as a sum of positive squares in only one way, i.e., 20448484 + 12794929 = 4522^2 + 3577^2 .

It is not a de Polignac number, because 33243413 - 28 = 33243157 is a prime.

It is a super-2 number, since 2×332434132 = 2210249015777138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33243403) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 339170 + ... + 339267.

It is an arithmetic number, because the mean of its divisors is an integer number (6445161).

Almost surely, 233243413 is an apocalyptic number.

It is an amenable number.

33243413 is a deficient number, since it is larger than the sum of its proper divisors (5427553).

33243413 is an equidigital number, since it uses as much as digits as its factorization.

33243413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678451 (or 678444 counting only the distinct ones).

The product of its digits is 2592, while the sum is 23.

The square root of 33243413 is about 5765.7101037080. The cubic root of 33243413 is about 321.5401438327.

The spelling of 33243413 in words is "thirty-three million, two hundred forty-three thousand, four hundred thirteen".

Divisors: 1 7 49 678437 4749059 33243413