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13215631326 = 2317129565013
BaseRepresentation
bin11000100111011011…
…01000011111011110
31021010000112122000220
430103231220133132
5204031200200301
610023212502210
7645332004252
oct142355503736
937100478026
1013215631326
115671974467
122689a7a966
131327c6cac1
148d525a262
15525347936
hex313b687de

13215631326 has 16 divisors (see below), whose sum is σ = 27986043024. Its totient is φ = 4146080384.

The previous prime is 13215631301. The next prime is 13215631333. The reversal of 13215631326 is 62313651231.

It is a super-2 number, since 2×132156313262 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64782405 + ... + 64782608.

It is an arithmetic number, because the mean of its divisors is an integer number (1749127689).

Almost surely, 213215631326 is an apocalyptic number.

13215631326 is an abundant number, since it is smaller than the sum of its proper divisors (14770411698).

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

13215631326 is a wasteful number, since it uses less digits than its factorization.

13215631326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129565035.

The product of its digits is 19440, while the sum is 33.

The spelling of 13215631326 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, three hundred twenty-six".

Divisors: 1 2 3 6 17 34 51 102 129565013 259130026 388695039 777390078 2202605221 4405210442 6607815663 13215631326