Search a number
-
+
87287214309 = 31943118231949
BaseRepresentation
bin101000101001010111…
…0010011000011100101
322100022012021220202020
41101102232103003211
52412231011324214
6104033231533353
76210026036241
oct1212256230345
9270265256666
1087287214309
11340223a2049
1214b0038a259
138300ab0049
1443208db421
15240d11d4a9
hex1452b930e5

87287214309 has 32 divisors (see below), whose sum is σ = 122923008000. Its totient is φ = 54942482880.

The previous prime is 87287214299. The next prime is 87287214319. The reversal of 87287214309 is 90341278278.

It is an interprime number because it is at equal distance from previous prime (87287214299) and next prime (87287214319).

It is not a de Polignac number, because 87287214309 - 24 = 87287214293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87287214319) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 44784667 + ... + 44786615.

It is an arithmetic number, because the mean of its divisors is an integer number (3841344000).

Almost surely, 287287214309 is an apocalyptic number.

It is an amenable number.

87287214309 is a deficient number, since it is larger than the sum of its proper divisors (35635793691).

87287214309 is a wasteful number, since it uses less digits than its factorization.

87287214309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 87287214309 in words is "eighty-seven billion, two hundred eighty-seven million, two hundred fourteen thousand, three hundred nine".

Divisors: 1 3 19 57 431 1293 1823 1949 5469 5847 8189 24567 34637 37031 103911 111093 785713 840019 2357139 2520057 3553027 10659081 14928547 15960361 44785641 47881083 67507513 202522539 1531354637 4594063911 29095738103 87287214309