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BaseRepresentation
bin11101000101000…
…111100110101011
31021000000221002112
4131011013212223
51444344144011
6120224552535
715042630653
oct3505074653
91230027075
10487881131
1123043a351
1211748274b
137a100c7a
1448b1d363
152cc7258b
hex1d1479ab

487881131 has 4 divisors (see below), whose sum is σ = 503619264. Its totient is φ = 472143000.

The previous prime is 487881109. The next prime is 487881133. The reversal of 487881131 is 131188784.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 487881131 - 26 = 487881067 is a prime.

It is a super-2 number, since 2×4878811312 = 476055995971678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487881133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7869020 + ... + 7869081.

It is an arithmetic number, because the mean of its divisors is an integer number (125904816).

Almost surely, 2487881131 is an apocalyptic number.

487881131 is a deficient number, since it is larger than the sum of its proper divisors (15738133).

487881131 is a wasteful number, since it uses less digits than its factorization.

487881131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15738132.

The product of its digits is 43008, while the sum is 41.

The square root of 487881131 is about 22088.0313971164. The cubic root of 487881131 is about 787.2355069098.

The spelling of 487881131 in words is "four hundred eighty-seven million, eight hundred eighty-one thousand, one hundred thirty-one".

Divisors: 1 31 15738101 487881131