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51232802522720 = 25571331731554899
BaseRepresentation
bin10111010011000100100001…
…11111101100011001100000
320201101210211002121011221012
423221202100333230121200
523203344234421211340
6300544005145520052
713535306415106160
oct1351422077543140
9221353732534835
1051232802522720
1115362789429a95
1258b5315aa3028
132278303ba4330
14c9197645a5a0
155dca3950b565
hex2e9890fec660

51232802522720 has 384 divisors, whose sum is σ = 155881287475200. Its totient is φ = 15476335165440.

The previous prime is 51232802522599. The next prime is 51232802522747. The reversal of 51232802522720 is 2722520823215.

It is a super-2 number, since 2×512328025227202 (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32171831 + ... + 33726729.

It is an arithmetic number, because the mean of its divisors is an integer number (405940852800).

Almost surely, 251232802522720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51232802522720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77940643737600).

51232802522720 is an abundant number, since it is smaller than the sum of its proper divisors (104648484952480).

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

51232802522720 is a wasteful number, since it uses less digits than its factorization.

51232802522720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555038 (or 1555030 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 51232802522720 in words is "fifty-one trillion, two hundred thirty-two billion, eight hundred two million, five hundred twenty-two thousand, seven hundred twenty".