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38200000215 = 35131063118427
BaseRepresentation
bin100011100100111001…
…011011111011010111
310122121020001001222210
4203210321123323113
51111213200001330
625314314324503
72521426434006
oct434471337327
9118536031883
1038200000215
11152229a4613
1274a1129733
1337aa192630
141bc54d4c3d
15ed897d8b0
hex8e4e5bed7

38200000215 has 32 divisors (see below), whose sum is σ = 65831302656. Its totient is φ = 18803364480.

The previous prime is 38200000207. The next prime is 38200000217. The reversal of 38200000215 is 51200000283.

38200000215 is a nontrivial binomial coefficient, being equal to C(276406, 2).

It is not a de Polignac number, because 38200000215 - 23 = 38200000207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38200000191 and 38200000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38200000217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2063832 + ... + 2082258.

It is an arithmetic number, because the mean of its divisors is an integer number (2057228208).

Almost surely, 238200000215 is an apocalyptic number.

38200000215 is the 276405-th triangular number and also the 138203-rd hexagonal number.

38200000215 is a deficient number, since it is larger than the sum of its proper divisors (27631302441).

38200000215 is a wasteful number, since it uses less digits than its factorization.

38200000215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29079.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 38200000215 its reverse (51200000283), we get a palindrome (89400000498).

The spelling of 38200000215 in words is "thirty-eight billion, two hundred million, two hundred fifteen", and thus it is an aban number.

Divisors: 1 3 5 13 15 39 65 195 10631 18427 31893 53155 55281 92135 138203 159465 239551 276405 414609 691015 718653 1197755 2073045 3593265 195897437 587692311 979487185 2546666681 2938461555 7640000043 12733333405 38200000215