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131215524050 = 252131971024721
BaseRepresentation
bin111101000110100001…
…1100000000011010010
3110112200122011021011002
41322031003200003102
54122212133232200
6140140220022002
712323433360152
oct1721503400322
9415618137132
10131215524050
1150714819366
122151b991902
13c4b1973030
1464caaba762
15362e918bd5
hex1e8d0e00d2

131215524050 has 48 divisors (see below), whose sum is σ = 264169232712. Its totient is φ = 48202828800.

The previous prime is 131215524043. The next prime is 131215524061. The reversal of 131215524050 is 50425512131.

It can be written as a sum of positive squares in 12 ways, for example, as 21613201 + 131193910849 = 4649^2 + 362207^2 .

It is a super-2 number, since 2×1312155240502 (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384311 + ... + 640410.

Almost surely, 2131215524050 is an apocalyptic number.

131215524050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131215524050 is an abundant number, since it is smaller than the sum of its proper divisors (132953708662).

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

131215524050 is a wasteful number, since it uses less digits than its factorization.

131215524050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024943 (or 1024938 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 131215524050 in words is "one hundred thirty-one billion, two hundred fifteen million, five hundred twenty-four thousand, fifty".

Divisors: 1 2 5 10 13 25 26 50 65 130 197 325 394 650 985 1970 2561 4925 5122 9850 12805 25610 64025 128050 1024721 2049442 5123605 10247210 13321373 25618025 26642746 51236050 66606865 133213730 201870037 333034325 403740074 666068650 1009350185 2018700370 2624310481 5046750925 5248620962 10093501850 13121552405 26243104810 65607762025 131215524050