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15238013 = 717312583
BaseRepresentation
bin111010001000…
…001101111101
31001200011121212
4322020031331
512400104023
61302334205
7243343460
oct72101575
931604555
1015238013
1186685aa
12512a365
133206a9b
1420492d7
15150ee78
hexe8837d

15238013 has 8 divisors (see below), whose sum is σ = 17516928. Its totient is φ = 12984624.

The previous prime is 15238007. The next prime is 15238031. The reversal of 15238013 is 31083251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15238013 - 210 = 15236989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15238013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15238063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5081 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (2189616).

Almost surely, 215238013 is an apocalyptic number.

It is an amenable number.

15238013 is a deficient number, since it is larger than the sum of its proper divisors (2278915).

15238013 is a wasteful number, since it uses less digits than its factorization.

15238013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12763.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15238013 is about 3903.5897581585. The cubic root of 15238013 is about 247.9187916993.

The spelling of 15238013 in words is "fifteen million, two hundred thirty-eight thousand, thirteen".

Divisors: 1 7 173 1211 12583 88081 2176859 15238013