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15000130 = 2513710949
BaseRepresentation
bin111001001110…
…001001000010
31001020002022101
4321032021002
512320001010
61253301014
7241333105
oct71161102
931202271
1015000130
118515902
12503476a
133152722
141dc673c
1514b473a
hexe4e242

15000130 has 16 divisors (see below), whose sum is σ = 27199800. Its totient is φ = 5955712.

The previous prime is 15000127. The next prime is 15000131. The reversal of 15000130 is 3100051.

15000130 = T2447 + T2448 + ... + T2451.

It is a Cunningham number, because it is equal to 38732+1.

It can be written as a sum of positive squares in 4 ways, for example, as 8814961 + 6185169 = 2969^2 + 2487^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (15000131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 6844.

Almost surely, 215000130 is an apocalyptic number.

15000130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15000130 is a deficient number, since it is larger than the sum of its proper divisors (12199670).

15000130 is a wasteful number, since it uses less digits than its factorization.

15000130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11093.

The product of its (nonzero) digits is 15, while the sum is 10.

The square root of 15000130 is about 3873.0001290989. Note that the first 3 decimals coincide. The cubic root of 15000130 is about 246.6219198923.

Adding to 15000130 its reverse (3100051), we get a palindrome (18100181).

The spelling of 15000130 in words is "fifteen million, one hundred thirty", and thus it is an aban number.

Divisors: 1 2 5 10 137 274 685 1370 10949 21898 54745 109490 1500013 3000026 7500065 15000130