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15230231 = 163223419
BaseRepresentation
bin111010000110…
…010100010111
31001122202221122
4322012110113
512344331411
61302234155
7243312002
oct72062427
931582848
1015230231
118662775
12512595b
133203393
142046539
15150c9db
hexe86517

15230231 has 8 divisors (see below), whose sum is σ = 15429120. Its totient is φ = 15032952.

The previous prime is 15230219. The next prime is 15230263. The reversal of 15230231 is 13203251.

15230231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15230231 - 26 = 15230167 is a prime.

It is a super-2 number, since 2×152302312 = 463919872626722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15230731) 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, 36140 + ... + 36558.

It is an arithmetic number, because the mean of its divisors is an integer number (1928640).

Almost surely, 215230231 is an apocalyptic number.

15230231 is a deficient number, since it is larger than the sum of its proper divisors (198889).

15230231 is a wasteful number, since it uses less digits than its factorization.

15230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 15230231 is about 3902.5928560381. The cubic root of 15230231 is about 247.8765807592.

Adding to 15230231 its reverse (13203251), we get a palindrome (28433482).

The spelling of 15230231 in words is "fifteen million, two hundred thirty thousand, two hundred thirty-one".

Divisors: 1 163 223 419 36349 68297 93437 15230231