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131030203 = 177707659
BaseRepresentation
bin1111100111101…
…01110010111011
3100010120000122111
413303311302323
5232020431303
621000233151
73150511153
oct763656273
9303500574
10131030203
1167a65a27
1237a6b7b7
13211b9685
141358b763
15b783b6d
hex7cf5cbb

131030203 has 4 divisors (see below), whose sum is σ = 138737880. Its totient is φ = 123322528.

The previous prime is 131030201. The next prime is 131030231. The reversal of 131030203 is 302030131.

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 131030203 - 21 = 131030201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131030201) 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, 3853813 + ... + 3853846.

It is an arithmetic number, because the mean of its divisors is an integer number (34684470).

Almost surely, 2131030203 is an apocalyptic number.

131030203 is a deficient number, since it is larger than the sum of its proper divisors (7707677).

131030203 is an equidigital number, since it uses as much as digits as its factorization.

131030203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7707676.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 131030203 is about 11446.8424903988. The cubic root of 131030203 is about 507.9143362591.

Adding to 131030203 its reverse (302030131), we get a palindrome (433060334).

It can be divided in two parts, 1310 and 30203, that added together give a palindrome (31513).

The spelling of 131030203 in words is "one hundred thirty-one million, thirty thousand, two hundred three".

Divisors: 1 17 7707659 131030203