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30131353 = 719322303
BaseRepresentation
bin111001011110…
…0010010011001
32002200211110001
41302330102121
530203200403
62553453001
7514053340
oct162742231
962624401
1030131353
111601014a
12a111161
13631ca05
144004b57
1529a2c1d
hex1cbc499

30131353 has 8 divisors (see below), whose sum is σ = 34615808. Its totient is φ = 25691904.

The previous prime is 30131333. The next prime is 30131363. The reversal of 30131353 is 35313103.

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

It is a de Polignac number, because none of the positive numbers 2k-30131353 is a prime.

It is a super-2 number, since 2×301313532 = 1815796867221218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30131353.

It is not an unprimeable number, because it can be changed into a prime (30131303) 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 7 ways as a sum of consecutive naturals, for example, 9801 + ... + 12502.

It is an arithmetic number, because the mean of its divisors is an integer number (4326976).

Almost surely, 230131353 is an apocalyptic number.

It is an amenable number.

30131353 is a deficient number, since it is larger than the sum of its proper divisors (4484455).

30131353 is a wasteful number, since it uses less digits than its factorization.

30131353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22503.

The product of its (nonzero) digits is 405, while the sum is 19.

The square root of 30131353 is about 5489.2033119570. The cubic root of 30131353 is about 311.1760840160.

Adding to 30131353 its reverse (35313103), we get a palindrome (65444456).

The spelling of 30131353 in words is "thirty million, one hundred thirty-one thousand, three hundred fifty-three".

Divisors: 1 7 193 1351 22303 156121 4304479 30131353