Search a number
-
+
230142405 = 35293779181
BaseRepresentation
bin11011011011110…
…11000111000101
3121001001110000210
431231323013011
5432404024110
634500430033
75463115053
oct1555730705
9531043023
10230142405
11108a00439
12650a8319
13388ac04c
14227cb1d3
1515310520
hexdb7b1c5

230142405 has 64 divisors (see below), whose sum is σ = 398361600. Its totient is φ = 113218560.

The previous prime is 230142391. The next prime is 230142427. The reversal of 230142405 is 504241032.

It is not a de Polignac number, because 230142405 - 220 = 229093829 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1271415 + ... + 1271595.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2230142405 is an apocalyptic number.

It is an amenable number.

230142405 is a deficient number, since it is larger than the sum of its proper divisors (168219195).

230142405 is a wasteful number, since it uses less digits than its factorization.

230142405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 230142405 is about 15170.4451154210. The cubic root of 230142405 is about 612.8189914129.

Adding to 230142405 its reverse (504241032), we get a palindrome (734383437).

The spelling of 230142405 in words is "two hundred thirty million, one hundred forty-two thousand, four hundred five".

Divisors: 1 3 5 15 29 37 79 87 111 145 181 185 237 395 435 543 555 905 1073 1185 2291 2715 2923 3219 5249 5365 6697 6873 8769 11455 14299 14615 15747 16095 20091 26245 33485 34365 42897 43845 71495 78735 84767 100455 194213 214485 254301 414671 423835 529063 582639 971065 1244013 1271505 1587189 2073355 2645315 2913195 6220065 7935945 15342827 46028481 76714135 230142405