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230142161 = 12713913037
BaseRepresentation
bin11011011011110…
…11000011010001
3121001001102200202
431231323003101
5432404022121
634500424545
75463114254
oct1555730321
9531042622
10230142161
11108a00237
12650a8155
13388abbc2
14227cb09b
151531040b
hexdb7b0d1

230142161 has 8 divisors (see below), whose sum is σ = 233640960. Its totient is φ = 226669968.

The previous prime is 230142139. The next prime is 230142167. The reversal of 230142161 is 161241032.

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 230142161 - 26 = 230142097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (230142167) 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, 11135 + ... + 24171.

It is an arithmetic number, because the mean of its divisors is an integer number (29205120).

Almost surely, 2230142161 is an apocalyptic number.

It is an amenable number.

230142161 is a deficient number, since it is larger than the sum of its proper divisors (3498799).

230142161 is a wasteful number, since it uses less digits than its factorization.

230142161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13303.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 230142161 is about 15170.4370734663. The cubic root of 230142161 is about 612.8187748399.

Adding to 230142161 its reverse (161241032), we get a palindrome (391383193).

The spelling of 230142161 in words is "two hundred thirty million, one hundred forty-two thousand, one hundred sixty-one".

Divisors: 1 127 139 13037 17653 1655699 1812143 230142161