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230157505 = 571648331
BaseRepresentation
bin11011011011111…
…10110011000001
3121001002012202001
431231332303001
5432410020010
634501024001
75463210064
oct1555766301
9531065661
10230157505
11108a10816
12650b5001
13388b5b96
14227d28db
1515314c3a
hexdb7ecc1

230157505 has 8 divisors (see below), whose sum is σ = 280079424. Its totient is φ = 181532400.

The previous prime is 230157503. The next prime is 230157553. The reversal of 230157505 is 505751032.

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

It is not a de Polignac number, because 230157505 - 21 = 230157503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230157503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323811 + ... + 324520.

It is an arithmetic number, because the mean of its divisors is an integer number (35009928).

Almost surely, 2230157505 is an apocalyptic number.

It is an amenable number.

230157505 is a deficient number, since it is larger than the sum of its proper divisors (49921919).

230157505 is an equidigital number, since it uses as much as digits as its factorization.

230157505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648407.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 230157505 is about 15170.9427854699. The cubic root of 230157505 is about 612.8323937879.

The spelling of 230157505 in words is "two hundred thirty million, one hundred fifty-seven thousand, five hundred five".

Divisors: 1 5 71 355 648331 3241655 46031501 230157505