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230541161 = 975694177
BaseRepresentation
bin11011011110111…
…00011101101001
3121001210201000112
431233130131221
5433004304121
634513144105
75466365444
oct1557343551
9531721015
10230541161
11109152a94
126525b035
13389bb6b6
142289265b
151538d75b
hexdbdc769

230541161 has 8 divisors (see below), whose sum is σ = 233383080. Its totient is φ = 227708928.

The previous prime is 230541137. The next prime is 230541209. The reversal of 230541161 is 161145032.

It can be written as a sum of positive squares in 4 ways, for example, as 41203561 + 189337600 = 6419^2 + 13760^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-230541161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230541461) 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, 53105 + ... + 57281.

It is an arithmetic number, because the mean of its divisors is an integer number (29172885).

Almost surely, 2230541161 is an apocalyptic number.

It is an amenable number.

230541161 is a deficient number, since it is larger than the sum of its proper divisors (2841919).

230541161 is an equidigital number, since it uses as much as digits as its factorization.

230541161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843.

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

The square root of 230541161 is about 15183.5819555202. The cubic root of 230541161 is about 613.1727205926.

Adding to 230541161 its reverse (161145032), we get a palindrome (391686193).

The spelling of 230541161 in words is "two hundred thirty million, five hundred forty-one thousand, one hundred sixty-one".

Divisors: 1 97 569 4177 55193 405169 2376713 230541161