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BaseRepresentation
bin101000101010110111…
…0111111100011011101
322100102201100021210212
41101111232333203131
52412331424300341
6104042234342205
76211211304152
oct1212556774335
9270381307725
1087337728221
1134048963987
1214b1528a965
13830b3b8333
1443274ca229
15241279a5eb
hex1455bbf8dd

87337728221 has 16 divisors (see below), whose sum is σ = 88693678080. Its totient is φ = 85990924800.

The previous prime is 87337728199. The next prime is 87337728253. The reversal of 87337728221 is 12282773378.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87337728221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87337728221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87337728281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24373796 + ... + 24377378.

It is an arithmetic number, because the mean of its divisors is an integer number (5543354880).

Almost surely, 287337728221 is an apocalyptic number.

It is an amenable number.

87337728221 is a deficient number, since it is larger than the sum of its proper divisors (1355949859).

87337728221 is a wasteful number, since it uses less digits than its factorization.

87337728221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756.

The product of its digits is 1580544, while the sum is 50.

The spelling of 87337728221 in words is "eighty-seven billion, three hundred thirty-seven million, seven hundred twenty-eight thousand, two hundred twenty-one".