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BaseRepresentation
bin1111101101110…
…00000010110101
3100012001110001201
413312320002311
5232221411340
621025252501
73160333624
oct766700265
9305043051
10131825845
1168459788
1238194131
1321407878
14137176bb
15b88e79a
hex7db80b5

131825845 has 4 divisors (see below), whose sum is σ = 158191020. Its totient is φ = 105460672.

The previous prime is 131825843. The next prime is 131825861. The reversal of 131825845 is 548528131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548528131 = 1187462113.

It can be written as a sum of positive squares in 2 ways, for example, as 58706244 + 73119601 = 7662^2 + 8551^2 .

It is a cyclic number.

It is not a de Polignac number, because 131825845 - 21 = 131825843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131825843) 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, 13182580 + ... + 13182589.

It is an arithmetic number, because the mean of its divisors is an integer number (39547755).

Almost surely, 2131825845 is an apocalyptic number.

It is an amenable number.

131825845 is a deficient number, since it is larger than the sum of its proper divisors (26365175).

131825845 is an equidigital number, since it uses as much as digits as its factorization.

131825845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26365174.

The product of its digits is 38400, while the sum is 37.

The square root of 131825845 is about 11481.5436679917. The cubic root of 131825845 is about 508.9403153977.

The spelling of 131825845 in words is "one hundred thirty-one million, eight hundred twenty-five thousand, eight hundred forty-five".

Divisors: 1 5 26365169 131825845