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131242201 is a prime number
BaseRepresentation
bin1111101001010…
…01100011011001
3100010221210110021
413310221203121
5232044222301
621004550441
73152353216
oct764514331
9303853407
10131242201
11680a0232
1237b52421
132126200c
1413604b0d
15b7c68a1
hex7d298d9

131242201 has 2 divisors, whose sum is σ = 131242202. Its totient is φ = 131242200.

The previous prime is 131242187. The next prime is 131242217. The reversal of 131242201 is 102242131.

It is an a-pointer prime, because the next prime (131242217) can be obtained adding 131242201 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 20466576 = 10525^2 + 4524^2 .

It is a cyclic number.

It is not a de Polignac number, because 131242201 - 27 = 131242073 is a prime.

It is not a weakly prime, because it can be changed into another prime (131242801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65621100 + 65621101.

It is an arithmetic number, because the mean of its divisors is an integer number (65621101).

Almost surely, 2131242201 is an apocalyptic number.

It is an amenable number.

131242201 is a deficient number, since it is larger than the sum of its proper divisors (1).

131242201 is an equidigital number, since it uses as much as digits as its factorization.

131242201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 131242201 is about 11456.0988560679. The cubic root of 131242201 is about 508.1881123348.

Adding to 131242201 its reverse (102242131), we get a palindrome (233484332).

The spelling of 131242201 in words is "one hundred thirty-one million, two hundred forty-two thousand, two hundred one".