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30253241 = 31231481
BaseRepresentation
bin111001101101…
…0000010111001
32002221000122102
41303122002321
530221100431
63000233145
7515101604
oct163320271
962830572
1030253241
1116093787
12a16b7b5
136363335
14403733b
1529c8dcb
hex1cda0b9

30253241 has 6 divisors (see below), whose sum is σ = 31261626. Its totient is φ = 29276400.

The previous prime is 30253231. The next prime is 30253243. The reversal of 30253241 is 14235203.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 11417641 = 4340^2 + 3379^2 .

It is not a de Polignac number, because 30253241 - 218 = 29991097 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 (30253243) 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, 14780 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (5210271).

Almost surely, 230253241 is an apocalyptic number.

30253241 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30253241 is a deficient number, since it is larger than the sum of its proper divisors (1008385).

30253241 is an equidigital number, since it uses as much as digits as its factorization.

30253241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31543 (or 31512 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30253241 is about 5500.2946284722. The cubic root of 30253241 is about 311.5951115753.

Adding to 30253241 its reverse (14235203), we get a palindrome (44488444).

The spelling of 30253241 in words is "thirty million, two hundred fifty-three thousand, two hundred forty-one".

Divisors: 1 31 961 31481 975911 30253241