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230145461 = 71319133109
BaseRepresentation
bin11011011011110…
…11110110110101
3121001001121012222
431231323312311
5432404123321
634500452125
75463130010
oct1555736665
9531047188
10230145461
11108a02767
12650aa045
13388b0560
14227cc377
15153113ab
hexdb7bdb5

230145461 has 16 divisors (see below), whose sum is σ = 298166400. Its totient is φ = 172507968.

The previous prime is 230145431. The next prime is 230145493. The reversal of 230145461 is 164541032.

It is a cyclic number.

It is not a de Polignac number, because 230145461 - 210 = 230144437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230145461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230145431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64826 + ... + 68283.

It is an arithmetic number, because the mean of its divisors is an integer number (18635400).

Almost surely, 2230145461 is an apocalyptic number.

It is an amenable number.

230145461 is a deficient number, since it is larger than the sum of its proper divisors (68020939).

230145461 is a wasteful number, since it uses less digits than its factorization.

230145461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133148.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 230145461 is about 15170.5458372466. The cubic root of 230145461 is about 612.8217038879.

Adding to 230145461 its reverse (164541032), we get a palindrome (394686493).

The spelling of 230145461 in words is "two hundred thirty million, one hundred forty-five thousand, four hundred sixty-one".

Divisors: 1 7 13 19 91 133 247 1729 133109 931763 1730417 2529071 12112919 17703497 32877923 230145461