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131054141 = 193679037
BaseRepresentation
bin1111100111110…
…11101000111101
3100010121020111002
413303323220331
5232022213031
621000540045
73150641021
oct763735075
9303536432
10131054141
1167a81a09
1237a81625
13211c753a
1413596381
15b78accb
hex7cfba3d

131054141 has 4 divisors (see below), whose sum is σ = 131733372. Its totient is φ = 130374912.

The previous prime is 131054129. The next prime is 131054149. The reversal of 131054141 is 141450131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141450131 = 1094912919.

It can be written as a sum of positive squares in 2 ways, for example, as 75864100 + 55190041 = 8710^2 + 7429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-131054141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131054149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339326 + ... + 339711.

It is an arithmetic number, because the mean of its divisors is an integer number (32933343).

Almost surely, 2131054141 is an apocalyptic number.

It is an amenable number.

131054141 is a deficient number, since it is larger than the sum of its proper divisors (679231).

131054141 is an equidigital number, since it uses as much as digits as its factorization.

131054141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679230.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 131054141 is about 11447.8880585023. Note that the first 3 decimals coincide. The cubic root of 131054141 is about 507.9452647849.

The spelling of 131054141 in words is "one hundred thirty-one million, fifty-four thousand, one hundred forty-one".

Divisors: 1 193 679037 131054141