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87228074149 = 19231091831253
BaseRepresentation
bin101000100111100110…
…0101100100010100101
322100011002000021200221
41101033030230202211
52412120341333044
6104023320204341
76205410253036
oct1211714544245
9270132007627
1087228074149
1133aa1a79187
1214aa46096b1
1382c1774578
144316b04a8d
152407d3a484
hex144f32c8a5

87228074149 has 16 divisors (see below), whose sum is σ = 96690211200. Its totient is φ = 78318985536.

The previous prime is 87228074147. The next prime is 87228074189. The reversal of 87228074149 is 94147082278.

It is a cyclic number.

It is not a de Polignac number, because 87228074149 - 21 = 87228074147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87228074096 and 87228074105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87228074147) 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 15 ways as a sum of consecutive naturals, for example, 867994 + ... + 963259.

It is an arithmetic number, because the mean of its divisors is an integer number (6043138200).

Almost surely, 287228074149 is an apocalyptic number.

It is an amenable number.

87228074149 is a deficient number, since it is larger than the sum of its proper divisors (9462137051).

87228074149 is a wasteful number, since it uses less digits than its factorization.

87228074149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831404.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 87228074149 in words is "eighty-seven billion, two hundred twenty-eight million, seventy-four thousand, one hundred forty-nine".

Divisors: 1 19 23 109 437 2071 2507 47633 1831253 34793807 42118819 199606577 800257561 3792524963 4590951271 87228074149