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131088920 = 2355635821
BaseRepresentation
bin1111101000001…
…00001000011000
3100010200000012012
413310010020120
5232024321140
621001405052
73151144304
oct764041030
9303600165
10131088920
1167aa6056
1237a99788
132120a311
14135a4d04
15b796265
hex7d04218

131088920 has 32 divisors (see below), whose sum is σ = 295524720. Its totient is φ = 52333440.

The previous prime is 131088911. The next prime is 131088929. The reversal of 131088920 is 29880131.

It is an interprime number because it is at equal distance from previous prime (131088911) and next prime (131088929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131088929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19610 + ... + 25430.

Almost surely, 2131088920 is an apocalyptic number.

131088920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131088920 is an abundant number, since it is smaller than the sum of its proper divisors (164435800).

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

131088920 is a wasteful number, since it uses less digits than its factorization.

131088920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395 (or 6391 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 131088920 is about 11449.4069715422. The cubic root of 131088920 is about 507.9901934577.

The spelling of 131088920 in words is "one hundred thirty-one million, eighty-eight thousand, nine hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 563 1126 2252 2815 4504 5630 5821 11260 11642 22520 23284 29105 46568 58210 116420 232840 3277223 6554446 13108892 16386115 26217784 32772230 65544460 131088920