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12531214808 = 237223771693
BaseRepresentation
bin10111010101110101…
…10010100111011000
31012100022200200001222
423222322302213120
5201130442333213
65431243231212
7622351365650
oct135272624730
935308620058
1012531214808
1153505a9182
122518818508
131249228808
1486c3bb360
154d5202808
hex2eaeb29d8

12531214808 has 16 divisors (see below), whose sum is σ = 26852603280. Its totient is φ = 5370520608.

The previous prime is 12531214771. The next prime is 12531214823. The reversal of 12531214808 is 80841213521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111885791 + ... + 111885902.

It is an arithmetic number, because the mean of its divisors is an integer number (1678287705).

Almost surely, 212531214808 is an apocalyptic number.

It is an amenable number.

12531214808 is an abundant number, since it is smaller than the sum of its proper divisors (14321388472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12531214808 is a wasteful number, since it uses less digits than its factorization.

12531214808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223771706 (or 223771702 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The spelling of 12531214808 in words is "twelve billion, five hundred thirty-one million, two hundred fourteen thousand, eight hundred eight".

Divisors: 1 2 4 7 8 14 28 56 223771693 447543386 895086772 1566401851 1790173544 3132803702 6265607404 12531214808