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131132471 = 1920873307
BaseRepresentation
bin1111101000011…
…10110000110111
3100010202012221012
413310032300313
5232032214341
621002342435
73151415261
oct764166067
9303665835
10131132471
1168025848
1237abaa1b
13212240a2
14135b6b31
15b7a40eb
hex7d0ec37

131132471 has 8 divisors (see below), whose sum is σ = 138142080. Its totient is φ = 124133688.

The previous prime is 131132437. The next prime is 131132483. The reversal of 131132471 is 174231131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131132471 - 210 = 131131447 is a prime.

It is a super-3 number, since 3×1311324713 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131132411) 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, 38000 + ... + 41306.

It is an arithmetic number, because the mean of its divisors is an integer number (17267760).

Almost surely, 2131132471 is an apocalyptic number.

131132471 is a deficient number, since it is larger than the sum of its proper divisors (7009609).

131132471 is a wasteful number, since it uses less digits than its factorization.

131132471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413.

The product of its digits is 504, while the sum is 23.

The square root of 131132471 is about 11451.3087025021. The cubic root of 131132471 is about 508.0464428885.

The spelling of 131132471 in words is "one hundred thirty-one million, one hundred thirty-two thousand, four hundred seventy-one".

Divisors: 1 19 2087 3307 39653 62833 6901709 131132471