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131052171 = 3173252509
BaseRepresentation
bin1111100111110…
…11001010001011
3100010121010210010
413303323022023
5232022132141
621000523003
73150632205
oct763731213
9303533703
10131052171
1167a80488
1237a80463
13211c6683
1413595775
15b78a416
hex7cfb28b

131052171 has 8 divisors (see below), whose sum is σ = 175746960. Its totient is φ = 86862752.

The previous prime is 131052169. The next prime is 131052179. The reversal of 131052171 is 171250131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131052171 - 21 = 131052169 is a prime.

It is a super-3 number, since 3×1310521713 (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (131052179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125736 + ... + 126773.

It is an arithmetic number, because the mean of its divisors is an integer number (21968370).

Almost surely, 2131052171 is an apocalyptic number.

131052171 is a deficient number, since it is larger than the sum of its proper divisors (44694789).

131052171 is a wasteful number, since it uses less digits than its factorization.

131052171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252685.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 131052171 is about 11447.8020161077. The cubic root of 131052171 is about 507.9427196353.

The spelling of 131052171 in words is "one hundred thirty-one million, fifty-two thousand, one hundred seventy-one".

Divisors: 1 3 173 519 252509 757527 43684057 131052171