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130247213 = 312135533
BaseRepresentation
bin1111100001101…
…10101000101101
3100002002020120212
413300312220231
5231320402323
620531352205
73141040325
oct760665055
9302066525
10130247213
1167580728
1237752665
1320ca4175
1413426285
15b67bb78
hex7c36a2d

130247213 has 6 divisors (see below), whose sum is σ = 134585262. Its totient is φ = 126044760.

The previous prime is 130247203. The next prime is 130247231. The reversal of 130247213 is 312742031.

It can be written as a sum of positive squares in only one way, i.e., 125933284 + 4313929 = 11222^2 + 2077^2 .

It is not a de Polignac number, because 130247213 - 24 = 130247197 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 (130247203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66806 + ... + 68727.

It is an arithmetic number, because the mean of its divisors is an integer number (22430877).

Almost surely, 2130247213 is an apocalyptic number.

It is an amenable number.

130247213 is a deficient number, since it is larger than the sum of its proper divisors (4338049).

130247213 is an equidigital number, since it uses as much as digits as its factorization.

130247213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135595 (or 135564 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 130247213 is about 11412.5901091733. The cubic root of 130247213 is about 506.9006090612.

Adding to 130247213 its reverse (312742031), we get a palindrome (442989244).

The spelling of 130247213 in words is "one hundred thirty million, two hundred forty-seven thousand, two hundred thirteen".

Divisors: 1 31 961 135533 4201523 130247213