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12215156352 = 273729349449
BaseRepresentation
bin10110110000001010…
…00111111010000000
31011112021222020101020
423120011013322000
5200004040000402
65340033105440
7611463054510
oct133005077200
934467866336
1012215156352
1151a9156843
12244a9b8280
1311c88c7689
1483c427840
154b75c08bc
hex2d8147e80

12215156352 has 256 divisors, whose sum is σ = 38556000000. Its totient is φ = 3352559616.

The previous prime is 12215156351. The next prime is 12215156413. The reversal of 12215156352 is 25365151221.

It is not an unprimeable number, because it can be changed into a prime (12215156351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27205024 + ... + 27205472.

It is an arithmetic number, because the mean of its divisors is an integer number (150609375).

Almost surely, 212215156352 is an apocalyptic number.

12215156352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12215156352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19278000000).

12215156352 is an abundant number, since it is smaller than the sum of its proper divisors (26340843648).

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

12215156352 is a wasteful number, since it uses less digits than its factorization.

12215156352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 839 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

It can be divided in two parts, 122151 and 56352, that added together give a triangular number (178503 = T597).

The spelling of 12215156352 in words is "twelve billion, two hundred fifteen million, one hundred fifty-six thousand, three hundred fifty-two".