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12530311253 = 97121116113
BaseRepresentation
bin10111010101101110…
…10110000001010101
31012100020222202121222
423222313112001111
5201130224430003
65431212020125
7622340613455
oct135267260125
935306882558
1012530311253
115350041339
122518461645
131248ca0475
1486c223d65
154d50c4c38
hex2eadd6055

12530311253 has 8 divisors (see below), whose sum is σ = 12551210496. Its totient is φ = 12509430400.

The previous prime is 12530311237. The next prime is 12530311267. The reversal of 12530311253 is 35211303521.

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

It is a cyclic number.

It is not a de Polignac number, because 12530311253 - 24 = 12530311237 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 (12530311223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2046725 + ... + 2052837.

It is an arithmetic number, because the mean of its divisors is an integer number (1568901312).

Almost surely, 212530311253 is an apocalyptic number.

It is an amenable number.

12530311253 is a deficient number, since it is larger than the sum of its proper divisors (20899243).

12530311253 is an equidigital number, since it uses as much as digits as its factorization.

12530311253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 12530311253 its reverse (35211303521), we get a palindrome (47741614774).

The spelling of 12530311253 in words is "twelve billion, five hundred thirty million, three hundred eleven thousand, two hundred fifty-three".

Divisors: 1 971 2111 6113 2049781 5935723 12904543 12530311253