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30353143 = 177997233
BaseRepresentation
bin111001111001…
…0011011110111
32010010002200111
41303302123313
530232300033
63002323451
7515666062
oct163623367
963102614
1030353143
1116151847
12a1b9587
136399952
1440618d9
1529e87cd
hex1cf26f7

30353143 has 16 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 27795456.

The previous prime is 30353119. The next prime is 30353159. The reversal of 30353143 is 34135303.

It is a cyclic number.

It is not a de Polignac number, because 30353143 - 29 = 30352631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30353443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130155 + ... + 130387.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 230353143 is an apocalyptic number.

30353143 is a deficient number, since it is larger than the sum of its proper divisors (2668937).

30353143 is a wasteful number, since it uses less digits than its factorization.

30353143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 1620, while the sum is 22.

The square root of 30353143 is about 5509.3686571149. The cubic root of 30353143 is about 311.9377169945.

Adding to 30353143 its reverse (34135303), we get a palindrome (64488446).

The spelling of 30353143 in words is "thirty million, three hundred fifty-three thousand, one hundred forty-three".

Divisors: 1 17 79 97 233 1343 1649 3961 7663 18407 22601 130271 312919 384217 1785479 30353143