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215023068 = 2232133114821
BaseRepresentation
bin11001101000011…
…11110111011100
3112222121022012100
430310033313130
5420021214233
633200405100
75220444261
oct1464176734
9488538170
10215023068
11100414017
1260016790
13357172b0
14207b3268
1513d25813
hexcd0fddc

215023068 has 72 divisors (see below), whose sum is σ = 604263296. Its totient is φ = 64022400.

The previous prime is 215023051. The next prime is 215023079. The reversal of 215023068 is 860320512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7098 + ... + 21918.

Almost surely, 2215023068 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 215023068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302131648).

215023068 is an abundant number, since it is smaller than the sum of its proper divisors (389240228).

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

215023068 is a wasteful number, since it uses less digits than its factorization.

215023068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14875 (or 14870 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 215023068 is about 14663.6648897880. The cubic root of 215023068 is about 599.0940661616.

The spelling of 215023068 in words is "two hundred fifteen million, twenty-three thousand, sixty-eight".

Divisors: 1 2 3 4 6 9 12 13 18 26 31 36 39 52 62 78 93 117 124 156 186 234 279 372 403 468 558 806 1116 1209 1612 2418 3627 4836 7254 14508 14821 29642 44463 59284 88926 133389 177852 192673 266778 385346 459451 533556 578019 770692 918902 1156038 1378353 1734057 1837804 2312076 2756706 3468114 4135059 5513412 5972863 6936228 8270118 11945726 16540236 17918589 23891452 35837178 53755767 71674356 107511534 215023068