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15080317 = 72154331
BaseRepresentation
bin111001100001…
…101101111101
31001101011022021
4321201231331
512330032232
61255120141
7242115640
oct71415575
931334267
1015080317
11857007a
125073051
133180085
142007a57
1514cd397
hexe61b7d

15080317 has 4 divisors (see below), whose sum is σ = 17234656. Its totient is φ = 12925980.

The previous prime is 15080311. The next prime is 15080323. The reversal of 15080317 is 71308051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71308051 = 179398369.

It is an interprime number because it is at equal distance from previous prime (15080311) and next prime (15080323).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-15080317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15080291 and 15080300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15080311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077159 + ... + 1077172.

It is an arithmetic number, because the mean of its divisors is an integer number (4308664).

Almost surely, 215080317 is an apocalyptic number.

It is an amenable number.

15080317 is a deficient number, since it is larger than the sum of its proper divisors (2154339).

15080317 is an equidigital number, since it uses as much as digits as its factorization.

15080317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154338.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 15080317 is about 3883.3383834016. The cubic root of 15080317 is about 247.0605991391.

Adding to 15080317 its reverse (71308051), we get a palindrome (86388368).

The spelling of 15080317 in words is "fifteen million, eighty thousand, three hundred seventeen".

Divisors: 1 7 2154331 15080317